The authors used the orchid checklist published by Archila and colleagues in 2018, which listed more than 1,200 taxa, as the basis for their search. They searched academic databases including PubMed, Web of Science and Scopus, together with relevant botanical databases, using combinations of terms such as “orchids,” “pollination” and “Guatemala.”

Studies were eligible when they addressed pollination of orchid species known to occur in Guatemala and covered subjects such as floral morphology, pollinator behaviour or ecological interactions. The researchers excluded publications that did not provide solid data, including reports of pollinia transfer. Titles and abstracts were screened first, after which the full texts of selected studies were assessed.

Information was extracted from the included papers about the orchid species studied, identified pollinators, relevant floral traits and ecological settings. These data were organized for analysis. The resulting review showed that most of the available information was sparse or incomplete, and only a small number of the cited studies had been conducted in Guatemala itself.

At least one effective pollinator was documented for every species in 22 genera, but each of those genera was represented in Guatemala by only one or two species. For 150 genera, the review found no documented effective pollinator. Known pollinator groups included bees, wasps, flies, butterflies, moths and hummingbirds, with observations of pollinia transfer forming an important criterion for inclusion.

The pattern differed considerably among the larger genera. Known pollinators were reported for 27% of the 30 Guatemalan Stanhopea species, 25% of the four Phragmipedium species and 20% each for the five Acropera and Myrmecophila species. Coverage was lower for several other genera, including Sobralia, with known pollinators for three of 47 species, Encyclia, with two of 32, Epidendrum, with one of 113, and Stelis, with one of 36.

The review describes several limitations in studying pollination among tropical orchids. Their diversity complicates species identification and the construction of comprehensive datasets, while cryptic habits can make orchids difficult to locate. Specialized floral structures and strategies such as mimicry, deceit and rewards also require detailed study of both the plants and their pollinator communities. Some pollinators may be difficult to observe, and nighttime or otherwise elusive interactions can require specialized equipment and considerable logistical effort.

Environmental pressures add another constraint because habitat loss and climate fluctuations may affect both orchids and their pollinators. The review also notes an imbalance in the wider literature: tropical regions, including Latin America, are less represented than temperate and subtropical areas, where more active pollination research is concentrated. It cites an analysis in which only half of species records with reproductive data were epiphytic even though about 72% of orchid species exhibit epiphytic growth, indicating an underrepresentation of that ecological form in the available research.

Overall, the authors conclude that the pollination biology of Guatemala’s orchids remains largely unexplored. They argue that future investigations should combine expertise from ecology, botany and entomology to address the difficulty of studying tropical orchid–pollinator relationships. They also state that filling these gaps is important for understanding the role of orchids in tropical ecosystems and for developing effective conservation strategies for these threatened plants.

Subject of Research: A systematic literature review of pollination biology in Guatemalan orchid species

Article Title: Pollination of Guatemalan orchids – state of knowledge

Article References: Lipińska, M. M., & Barabasz, C. (2024). Pollination of Guatemalan orchids – state of knowledge. Neotropical Biology and Conservation, 19(2), 199-221. https://doi.org/10.3897/neotropical.19.e119499

Image Credits: AI Generated

DOI: 10.3897/neotropical.19.e119499

Keywords: orchid pollination, Guatemala, pollinators, orchid diversity, systematic review, tropical ecosystems, pollinia transfer, research gaps, biodiversity conservation, Pollination, Guatemalan, orchids

The study examined a small sample of wild workers at one campus site rather than comparing managed colonies or testing bee health outcomes. Observations of bumble bees using scale honeydew remain scarce, while earlier accounts have mainly described honeydew produced by aphids. Cameron and colleagues proposed that heat- and drought-related stress could shift B. terrestris toward evaporated aphid honeydew when floral nectar is limited; that account was a proposed mechanism rather than a directly observed result of the current study.

Honeydew is a carbohydrate- and amino-acid-rich excretion produced by sap-feeding insects. Scale insects use piercing mouthparts to reach phloem sap, and their honeydew can coat branches and leaves and facilitate sooty mold growth, potentially reducing photosynthetic capacity. Some animals nevertheless consume honeydew as food.

The best-known example is the association between aphids and ants, in which ants receive honeydew and may protect aphid colonies. Lepidopterans, spiders, neuropterans and various hymenopterans can also consume honeydew, often indirectly, while the relationship between pine scale, Marchalina hellenica, and the honey bee Apis mellifera is documented in Greece and Türkiye. The approximately 10-square-kilometre Hacettepe University campus is bordered by pine plantations and open areas with steppe vegetation.

The surrounding semi-natural landscape, supported by irrigation and landscaping, also contained flowering plants including Daucus carota, Carduus nutans var. nutans, Hypericum perforatum, Stachys annua subsp. annua, Convolvulus lineatus, Centaurea triumfettii, Anchusa azurea var. azurea, Sideritis montana, Salvia absconditiflora, Lamium amplexicaule, Trifolium species and Astragalus species. During the June 2024 observations, the S. prunastri colonies consisted mainly of young females located on the undersides of P. cerasifera branches. Although honeydew droplets were present on both leaves and branches, the approximately 20 B. terrestris workers were observed collecting it exclusively from the colonized branches.

Female scale insects were preserved in 75% ethanol and identified using established criteria, while the bumble bees were identified according to the reference of Rasmont and colleagues. Flowering plants in the area were determined using the Flora of Turkey and the Beytepe Bitkileri reference. For chemical analysis, the researchers placed a 30-by-50-centimetre glass sheet beneath the tree from 11:00 to 14:00.

They retrieved the deposited honeydew by gently scraping it from the glass with a razor blade and stored the samples at minus 20 degrees Celsius. High-performance liquid chromatography was then used to quantify glucose, fructose, sucrose and galactose in triplicate. The samples contained glucose at 13.3 ± 0.1 mg/mL, fructose at 4.7 ± 0.0 mg/mL and sucrose at 3.3 ± 0.0 mg/mL; galactose was not detected.

Glucose was therefore the dominant measured sugar. The authors characterized the overall sugar concentrations as low and considered the profile consistent with the variable and often dilute composition of scale-insect honeydew. Its composition can differ with host-plant chemistry and the metabolic processes of the producing insect.

Previous studies cited by the researchers found substantial variation among scale-insect species and host plants, with many scale insects producing honeydew more dilute than aphid honeydew or most floral nectars. The measured profile therefore represents a modest carbohydrate source with a specific composition rather than evidence of high nutritional value. Two previously described traits may help explain how B. terrestris detects and uses dilute sugars: workers have dense antennal taste receptors, and earlier experiments found that they can shift their sugar preference toward fructose after exposure to fructose-rich resources.

The species is also polylectic, visiting plants across numerous families in Türkiye. The authors regarded hydration as an unlikely primary explanation because the campus was regularly irrigated and included several water sources, such as ornamental ponds, wet soil and irrigation runoff. They therefore considered carbohydrate collection more consistent with supplemental energy foraging, although the observation alone cannot establish the bees’ physiological purpose or quantify their intake and energy gain.

Because honeydew collection occurred despite a rich floral assemblage, this case differs from reports that associate honeydew feeding with nectar scarcity. The authors interpret the observation as evidence of opportunistic use that is not restricted to a food-shortage response, not as proof of a mutualistic relationship between bees and scale insects. The study was limited by its single-campus setting, one June observation period, small observed sample and descriptive design.

It did not compare honeydew-fed with nectar-fed bees, quantify survival or reproduction, test the proposed mold-removal effect, or examine how temperature and relative humidity influence honeydew availability and foraging. The authors recommend more detailed chemical analysis, investigation of interactions with other wild bee species and evaluation of abiotic conditions to clarify honeydew’s ecological role in pollinator foraging.

Subject of Research: Observational evidence of buff-tailed bumble bees foraging on globose scale honeydew in Türkiye

Article Title: Sweet connections: the role of honeydew in supporting wild Bombus terrestris populations ( Hymenoptera , Apidae ) – a case study from Türkiye

Article References: Özenirler, Ç., Kamalak, E., Alkazak, A. D., Daşer Özgişi, B., Çilden, E., Ülgentürk, S., & Aytekin, A. M. (2026). Sweet connections: the role of honeydew in supporting wild Bombus terrestris populations (Hymenoptera, Apidae) – a case study from Türkiye. Journal of Hymenoptera Research, 99, 59-66. https://doi.org/10.3897/jhr.99.172251

Image Credits: AI Generated

DOI: 10.3897/jhr.99.172251

Keywords: Bombus terrestris, bumble bees, honeydew, Sphaerolecanium prunastri, scale insects, foraging behavior, Türkiye, Ankara, pollinators, field observation, Sweet, connections

The study took place from July 2015 to July 2016 in the Balsas River Basin of southern Morelos, Mexico. El Limón lies within the Sierra de Huautla Biosphere Reserve, where continuous dry forest remains relatively well conserved, although grazing, small-scale agriculture and activities associated with white-tailed deer management create some disturbance. Quilamula, outside the reserve’s boundaries, contains a larger proportion of cropland, pasture, secondary vegetation and human settlement, with only 31% of its area inside the reserve. Both localities have a warm subhumid climate and receive about 900 millimetres of rain annually, mainly from May through October, followed by a dry season from November through April.

Researchers sampled flowering understory vegetation on one sunny, rain-free day each month, except in December 2015. Two collectors spent seven hours traversing seven sampling sites at El Limón and five at Quilamula with light-mesh entomological nets measuring 30 centimetres in diameter. Sampling focused on accessible flowering shrubs and herbaceous plants, with trees included when flowering branches could be reached. The researchers described this as haphazard rather than randomized sampling. Individuals of the western honey bee, Apis mellifera, were not collected because the study focused on wild bees. One specimen per species was deposited in the Entomological Collection of the Center of Zoological Studies at the University of Guadalajara.

The researchers compared vegetation cover between the localities using the Modified Soil Adjusted Vegetation Index, or MSAVI. This remote-sensing measure was selected because it is related to leaf area in tropical dry forest and can distinguish sparse vegetation from bare soil in semi-arid ecosystems. For each locality, the team defined a polygon 450 metres wide around the sampling sites and placed 98 points at least 150 metres apart within it. Average MSAVI values were calculated at a spatial resolution of 30 metres for three periods: the 2015 rainy season, the 2015–2016 dry season and the 2016 rainy season. A linear mixed model showed that vegetation cover was higher at El Limón than at Quilamula when results were pooled across seasons, with a reported P value of 0.0003. Cropland occupied a larger area in the Quilamula polygon, whereas dry forest was more continuous around El Limón.

Bee abundance showed a pronounced seasonal cycle. It was highest during the 2015 rainy season at both localities, with 156 bees recorded at El Limón in October and the highest monthly count at Quilamula occurring in September. Counts were low throughout the dry season, and no bees were collected at either site in March. Apidae was the most abundant family, accounting for 524 individuals, or 49% of the catch, followed by Megachilidae with 309 individuals, or 29%. Colletidae was the least abundant family, with nine individuals at El Limón and three at Quilamula. Andrenidae and Colletidae were collected exclusively during the rainy seasons. Family-level abundance differed significantly across localities and seasons, showing that the seasonal totals concealed distinct taxonomic patterns.

Diversity was evaluated with three orders of Hill numbers. Zeroth-order diversity represented species richness, which gives unusual weight to rare species; first-order diversity represented effective species richness based on Shannon entropy and relative abundance; and second-order diversity corresponded to inverse Simpson diversity, which places more weight on common species. Sample coverage ranged from 92% to 100% across the six locality-season communities, indicating that the sampling was high under the study’s estimation method. Despite this coverage, about 24% of recorded species were represented by a single individual. Singletons accounted for 23% of species at El Limón and 24.3% at Quilamula, while species represented by two individuals accounted for 8.1% and 14.9%, respectively, underscoring the prevalence of rare taxa in the tropical bee assemblages.

No significant difference in any of the three diversity orders was detected between El Limón and Quilamula. Diversity instead peaked during the 2015 rainy season at both sites, significantly exceeding levels in the other four locality-season combinations. At El Limón, zeroth-order richness was 76 during the 2015 rains, compared with 13 in the 2016 rainy period and 18 in the dry season. Corresponding values at Quilamula were 73, nine and 17. First- and second-order estimates followed the same broad pattern, showing that both richness and abundance-weighted diversity were highest during the first rainy period. El Limón had greater total abundance than Quilamula, with 622 bees from 107 species and 50 genera, compared with 454 bees from 99 species and 42 genera.

The seasonal contrast must be interpreted alongside unequal sampling duration and rainfall timing. The 2015 rainy season covered four months, from July through October, including peak rainfall in July and September and the end of the wet period. The 2016 rainy season lasted three months, from May through July, and sampling ended because of financial constraints. The longer and wetter 2015 period coincided with greater growth of understory herbs and annual plants, which provide floral resources for bees. The 2016 rainy period covered only the beginning of rainfall. During the dry season, flowers were scarce in the understory, and available floral density came more from trees and shrubs. Because sampling was focused on understory vegetation, the observed communities likely represent only part of each site’s total bee diversity.

Multivariate analysis revealed greater separation among species assemblages than the aggregate diversity figures suggested. A non-metric multidimensional scaling ordination accounted for 54.1% of the variation in community composition, with 32.2% represented by the first axis and 21.9% by the second. An analysis of similarities produced a strong overall difference among the six locality-season communities, with r equal to 0.90 and P equal to 0.00001. All pairwise comparisons were significant. Of the 148 species detected, 57 occurred at both sites, 50 were exclusive to El Limón and 42 to Quilamula. The contrasting vegetation cover and land-use histories were therefore associated with different bee communities even though overall diversity was statistically similar, a pattern consistent with the strong local turnover previously reported among tropical bees.

The findings do not establish that either locality supports a larger total bee diversity, nor do they directly demonstrate that conservation status caused the observed differences. The study compared two sites over a single year, used accessible flowering vegetation for sampling and measured landscape vegetation rather than every habitat feature. It also cannot distinguish whether the first-rainy-season advantage resulted from rainfall itself, flowering phenology, the duration of sampling or a combination of these factors. Responses to disturbance differ among bee taxa: some may benefit from agricultural habitats and annual plants, while others depend on particular floral resources, nesting materials or forest structure. The study’s broader significance lies in showing that a single measure of richness or abundance can conceal major seasonal and geographic turnover, while adding 148 recorded species to the limited baseline knowledge of the bee fauna of Morelos. It also illustrates why habitat comparisons in tropical dry forests need to consider species composition, season, vegetation cover and sampling duration together rather than treating total abundance as a complete measure of bee community health.

Subject of Research: Seasonal diversity and species composition of wild bees in two tropical dry-forest localities in central Mexico.

Article Title: Wild bee diversity in two sites of tropical dry forest in central Mexico

Article References: Martínez-Peralta, C., Fierros-López, H. E., Sánchez-Echeverría, K., Valencia-Esquivel, I., & Aguilar-Dorantes, K. M. (2025). Wild bee diversity in two sites of tropical dry forest in central Mexico. Journal of Hymenoptera Research, 98, 381-404. https://doi.org/10.3897/jhr.98.141108

Image Credits: AI Generated

DOI: 10.3897/jhr.98.141108

Keywords: wild bees, biodiversity, tropical dry forest, Mexico, Morelos, pollinators, seasonal ecology, vegetation cover, species composition, conservation, Wild, diversity

Türkiye hosts more than 1,800 recorded bee species, making it amongst the most diverse regions in the Western Palaearctic and a presumed centre of diversity, and possibly even a region of origin, for several bee groups. The country’s remarkable habitat diversity, spanning Mediterranean shrublands, steppes, marshes, halophilic grasslands and subalpine and alpine grasslands, combined with a high level of plant endemism, presumably supports a correspondingly high level of bee endemism. Yet despite this richness, the national fauna remains broadly incomplete, as evidenced by the dozens of species that have been described or newly reported from the country over the last years alone.

The expedition, carried out in Spring 2025, covered 42 sites distributed across southern Türkiye: 38 in the Mediterranean Region, in the provinces of Adana, Antalya, Mersin and Osmaniye, and four in the south of the Central Anatolia Region, in Karaman and Konya. Sampling sites were selected using searches in Google Maps for potential high-quality habitats, mainly sites surrounded by ample natural habitats, followed by on-site surveys to confirm the presence of sufficient floral diversity for attracting a high diversity of bees. Wild bees were collected using hand nets, with collectors prioritising species diversity by sampling on a maximum diversity of flowering plants. Sampling generally ran from 9 a.m. to 5 p.m., and specimens were killed with cyanide or ethyl acetate and pinned in collection the same day, each labelled with locality, altitude, GPS coordinates, date, collector and a unique identification code.

Species-level identification was performed in the lab by a team of 18 specialists, each responsible for particular genera or groups, including Thomas Brau for Halictus and related genera, Frédéric Carion for Nomada, Achik Dorchin for Eucera, Simone Flaminio for Lasioglossum and related genera, Guillaume Ghisbain for Bombus and Dasypoda, Michael Kuhlmann for Colletes, Andreas Müller for Chelostoma, Hoplitis and Osmia, Pierre Rasmont for Amegilla, Anthophora and related genera, Jakub Straka for Nomada and Sphecodes, Michaël Terzo for Ceratina and Xylocopa, Clément Tourbez for Megachile and related genera, and Thomas J. Wood for Andrena, Camptopoeum and Panurgus. Reference material from the collection of the Laboratory of Zoology at the University of Mons in Belgium and from each expert’s personal research collection was used to achieve the identifications. Where conflicting identifications were provided by different experts, these were specified in the identification remarks column of the dataset.

The geographical consistency of the identifications was first verified for each species using centralised resources, then additional targeted documentation was sought and a double-check of the identifications was carried out by Rémi Santerre to confirm the validity of the taxa found outside of their known range. The complete dataset covers 246 confidently identified species belonging to the six bee families present in the Palaearctic Region: Andrenidae, Apidae, Colletidae, Halictidae, Megachilidae and Melittidae. It includes another seven taxa for which the uncertain species identity is marked by the notations ‘cf.’, ‘aff.’ or ‘gr.’, indicating uncertain identification, close relationship to a mentioned species, or membership of a species-group. In addition, 112 specimens remain unidentified, representing between 27 and 42 recognisable taxonomic units, some of which may correspond to species already identified. These unidentified specimens are distributed amongst the genera Amegilla, Andrena, Anthophora, Chelostoma, Eucera, Halictus, Lasioglossum and Seladonia, with Andrena alone accounting for 26 specimens and between 10 and 23 recognisable taxonomic units.

Amongst the six species new for the fauna of Türkiye, Andrena igraeca is a recently described species whose presence in the Hatay Province was presumed due to a record in north-west Syria. It is now confirmed to occur in Türkiye by 13 specimens collected in three locations in the Nur Mountains, near to the Hatay Province, at elevations ranging from 1,346 to 1,926 metres. Anthophora dalmatica, known from south-eastern Europe and Western Asia, was represented by two males collected in a Cistus-rich shrubland near Anamur in Mersin Province. Although the boundaries of its distribution are unclear due to the unresolved taxonomy of the species-group to which it belongs, its presence in Türkiye was likely, as it occurs in the surrounding areas. Existing records of Anthophora atroalba from Türkiye might actually pertain to this species.

Anthophora subterranea, a polytypic circum-Mediterranean species with numerous synonyms, was represented by a single female collected in the Nur Mountains at 1,926 metres, at the border with Hatay Province. Despite being relatively common, none of its numerous synonym names has been reported yet from Türkiye to the best of the authors’ knowledge. Eucera parnassia, already known from several surrounding countries including neighbouring Aegean islands, was represented by five females collected in a Brassicaceae-rich meadow in a valley near İbradi in Antalya Province. Eucera parvicornis, belonging to the small subgenus Cubitalia composed of eight species of which most are primarily distributed in Western Asia, was represented by one female and four males collected near Geçimli in Mersin Province at 1,235 metres. This species is oligolectic on Boraginaceae with a preference for Anchusa and is considered Near Threatened in Europe.

Osmia jason, the sixth species new for Türkiye, belongs to the subgenus Neosmia, whose members build their nests in empty snail shells. Its complex nesting behaviour is explained in detail in earlier taxonomic work: the cell partition is made with leaf pulp and the entry is sealed with a three-layer final plug of leaf pulp, mineral materials and leaf pulp; the shell is plastered with leaf pulp, buried in the ground and covered with dried plant material. The five females were collected on flower-rich grasslands in orchards from two locations near Adana, at elevations of 107 and 140 metres. Beyond the six new country records, the expedition also highlighted species of particular conservation interest in neighbouring regions. Ammobatoides abdominalis, considered Vulnerable in Europe and distributed from Central Europe to western China and southern Siberia, was represented by a single male collected near Güzelyalı in Antalya Province. Three specimens of Melitturga syriaca, a presumed host, were found at the same location. Lasioglossum laeve, also considered Vulnerable in Europe, was represented by a single female collected in the Nur Mountains at 1,926 metres.

Several additional noteworthy species of taxonomic and biogeographical interest were documented. Andrena etesiaca, closely related to Andrena bassana and formerly considered a subspecies of it, seems to be restricted to central Türkiye, where it is known from a very limited number of specimens; the new records come from Ereğli in Konya Province at 1,112 metres. Ceratina denesi was described based on a single male specimen collected in Silifke in 1995, and no other records have been published since then apart from a putative female identified near Antalya in 2002. The four males collected near Alaçeşme are larger than the holotype, but the shape of tergum 7, the absence of concavity on the apical half of the clypeus and overall blue colouration separate it from the similar species Ceratina loewi and Ceratina cypriaca.

Perhaps the most unexpected finding was Ceratina rasmonti, previously known only from the four females constituting the type series, collected in Erçek and Ağrı in eastern Türkiye at an altitude of around 1,800 metres. The finding of this species in south-western Türkiye, at 478 metres near Beydiğin and 956 metres near İbradi, was therefore surprising. The new specimens have the tibiae less extensively white-marked than the type specimens and were first misidentified as Ceratina dallatorreana, a related and much more common species. The two species could be distinguished only after a second careful examination, Ceratina rasmonti having sparser punctation on the scutum and between the ocelli, a depressed ocello-occipital area, a carinate occipital margin and less developed wax glands on sternum 3 than Ceratina dallatorreana. This suggests that this presumably rare species might be under-recorded due to the difficulty in detecting it amongst series of Ceratina dallatorreana, a cautionary reminder that even well-collected faunas can conceal species in plain sight.

Subject of Research: Biodiversity

Article Title: New records of wild bees from a spring expedition in southern Türkiye, with six new species for the country ( Hymenoptera , Apoidea , Anthophila )

Article References: Santerre, R., Michez, D., Aytekin, A., Aytekin, S., Benrezkallah, J., Brau, T., Carion, F., Dikmen, F., Dorchin, A., Eldem, V., Flaminio, S., Hopfenmüller, S., Kamalak, E., Maugendre, A., Özenirler, Ç., Rasmont, P., Rigaut, B., Terzo, M., Tourbez, C., & Ghisbain, G. (2026). New records of wild bees from a spring expedition in southern Türkiye, with six new species for the country (Hymenoptera, Apoidea, Anthophila). Biodiversity Data Journal, 14, Article e191847. https://doi.org/10.3897/bdj.14.e191847

Image Credits: AI Generated

DOI: 10.3897/BDJ.14.e191847

Keywords: wild bees, Türkiye, biodiversity, pollinators, new species records, Mediterranean, taxonomy, conservation, records, wild, bees, spring

The argument, published in the journal Natural History Collections and Museomics, draws on more than two years of firsthand experience using outreach collections from the Snow Entomological Museum at public events. These include Hasta Luego Monarchs, an annual insect education event organised around the monarch butterfly migration by the Johnson County Extension Master Naturalists and Monarch Watch, and Night in the Museum, hosted by the university’s Biodiversity Institute. Each event draws several hundred visitors, mostly children and their parents. And while visitors appear engaged, the author noticed a persistent separation between the public and the insects featured in the outreach drawers — remarks of disgust, squealing, flailing arms and visitors refusing to stand too close were common, especially among adults.

That separation, the author contends, is precisely what live insects can eliminate. The insight grew out of time spent caring for Bug Town, an exhibit at the Biodiversity Institute featuring fifteen live arthropod species ranging from wolf spiders and assassin bugs to hissing cockroaches and water scorpions. During daily husbandry of these animals, a striking pattern emerged: adult viewers remained apprehensive about the insects behind the glass panels, but children aged roughly four to twelve were invariably curious. If the keeper was actively handling an insect, the children wanted to touch or hold it, while the adults stayed back, especially when the animals were out of the case and within arm’s reach. The author cites studies suggesting that fear of insects is learned from adults, and argues that direct interaction with living insects is crucial to developing compassion toward them, regardless of age.

The physical design of entomological outreach collections compounds the problem. Pinned specimens are fragile, so keeping them in sealed cases is a key safety consideration — but the more the specimens are protected, the greater the separation between viewer and specimen. Unlike a fur pelt or a trilobite fossil, a pinned insect cannot be handled in the same way. It is easy to love charismatic megafauna when a personal connection can be established by touching and holding them, particularly when they are soft and cuddly. No one wants to cuddle a pinned cockroach, the author notes, nor could they even if they wanted to.

Choosing which live insects to use requires careful consideration of the distinction between potentially harmful species and those that will not hurt viewers. Bees are the author’s preferred insects, but crickets and smaller feeder roaches can be readily acquired from pet stores, and slow-moving species unlikely to jump or fly suddenly — hissing cockroaches, walking sticks and caterpillars — are ideal because they are easy to handle without startling visitors. Educators must also be mindful of potential allergies, particularly life-threatening ones such as allergies to bee and wasp venom, which may make live insects unsuitable for some audiences.

Male bees, specifically male bumble bees and carpenter bees, are the author’s top choice for live demonstrations. They are large and easy to catch at flowers, and because they lack the stinger that female bees possess, people can touch and hold them without being stung. Males can be identified by two primary traits: the length of their antennae and the presence of a large yellow face on the head. The author always collects live bees from native flowers near the outreach event, which increases the chances of the bee being a native species and provides a place to release it afterwards. The European honeybee is deliberately avoided — it is non-native, readily stings, and is the bee the public is already most familiar with.

When giving visitors the opportunity to handle a live bee, the author explains that the bee is male and cannot sting, and reassures them that they can have a firm grasp on it without hurting it. Visitors who feel uneasy about holding the bee in their fingers can simply cup their hands around it entirely, allowing it to move freely within their palms. The outreach drawers used in tandem contain both male and female specimens, so visitors can compare body size and colouration between the sexes, and if available a live female of the same species is kept temporarily in a glass jar for comparison. This also opens the door to discussing life history traits, such as what solitary bees are and why females can sting more than once without dying.

The emotional payoff of these interactions is immediate. Bumble bees buzz when threatened or handled, and the sensation and volume of the buzzing makes people laugh or surprises them at its intensity — sometimes both. By holding a live bee and feeling its movements, the notion that insects are just things dissolves; they become real. Getting to handle an insect shows viewers that these animals are truly alive, and it motivates them to care more about insects because they are no longer just pinned specimens behind glass. The author points to classroom monarch butterfly rearing and coordinated release to the wild — a component of the Hasta Luego Monarchs event — as another example of how hands-on positive interactions with live insects can inspire the public to care about the issues insects face both around the world and in their own backyards.

The author acknowledges that the observations presented are mostly derived from personal experience and are therefore likely biased, particularly given the limited research on the impact of incorporating live insects into outreach collections. But the recommendations for future evaluation are concrete. Research should assess different levels of incorporation of live insects, from none — pinned specimen-based collections — to full incorporation, such as raising monarch butterflies as hands-on learning. It may also be interesting to investigate the impact of photos of living specimens compared to photos of pinned museum specimens where living specimens are not accessible. An immediate suggestion would be the use of exit questionnaires for event visitors regarding their experiences with the collections, their feelings about insects and related topics after viewing and interacting with live organisms. Public feedback on these questionnaires can provide helpful insight into how visitors interact with outreach collections and inform future additions or changes. Another suggestion would be to gather data on the number of people who approached the collection, the number who only looked at the drawers versus the number who handled a live specimen, and the ages of the visitors — quantifiable data that can direct future outreach events and provide information for future studies.

The core message is that outreach collections can only benefit from the incorporation of live insects, which the author considers crucial to their future success as educational tools. By integrating living specimens with traditional displays, museums can inspire deeper connections and encourage conservation efforts, ensuring that people see insects as living organisms worth protecting rather than just specimens behind glass. In an era when insect diversity is threatened by anthropogenic factors and their interactions with plants and other organisms are at risk, fostering that personal connection may be one of the most effective ways to turn passive viewers into active participants in insect conservation.

Subject of Research: Use of live insects in museum outreach collections to foster public empathy and conservation

Article Title: Enhancing outreach collections with live insects

Article References: Herbison, N. (2025). Enhancing outreach collections with live insects. Natural History Collections and Museomics, 2, 1-7. https://doi.org/10.3897/nhcm.2.148359

Image Credits: AI Generated

DOI: 10.3897/nhcm.2.148359

Keywords: entomology, outreach collections, live insects, bumble bees, carpenter bees, museum education, insect conservation, fear of insects, public engagement, pollinators, Enhancing, outreach

The hornet’s story in Europe began quietly in 2004, when a queen, possibly just a single individual, was accidentally transported from China to France. Genetic analyses suggest this tiny founding population was enough to seed an invasion. By 2017, Vespa velutina had colonized nearly all of France, and from there it spread with remarkable speed: Spain in 2010, Portugal in 2011, Italy in 2013, Germany in 2014, and the United Kingdom in 2016. By 2020, individuals were turning up in Switzerland, the Netherlands, and Ireland. More recently, nests were discovered in 2023 in the Czech Republic and Hungary, and in Slovakia in 2024, while a lone individual was recorded in Austria. The invasion has now jumped continents, with the first colonies found near Savannah, Georgia, in the United States in 2023, and queens reported in New Zealand in November 2025.

The ecological and economic stakes are high. Vespa velutina hunts honeybees, locates apiaries, and decimates colonies, threatening local beekeeping operations and the livelihoods tied to them. It also preys on pollinators and decomposers more broadly, feeds on fruit, and reduces the abundance of insects that underpin ecosystem functioning. Because rising temperatures across Europe are expected to accelerate its spread, researchers emphasize that continuous efforts to stop or slow the invasion are urgently needed. Management typically operates on three levels: prevention, early detection, and eradication. Successful eradications have been achieved in the United Kingdom and on the Spanish island of Mallorca, but these victories depended on rapid detection and the elimination of every nest before the population could gain a foothold.

This is where public engagement becomes critical, and where current approaches fall short. Citizen reporting dramatically expands the area under surveillance, but the general public turns out to be surprisingly poor at identifying the hornet. In Guernsey, only 16.8 percent of public reports over three years were correct identifications. Other studies estimated public accuracy at roughly 30 percent, and among visitors at a bee festival, a motivated and experienced audience, only 33 percent identified the species correctly. In Mallorca, despite a successful eradication, a specially developed reporting app was downloaded by fewer than 3,700 people, less than half a percent of the island’s population. The researchers behind the new study identified two main bottlenecks: only a small fraction of the public is even aware of the threat, and those who do report often misidentify the species, complicating nest searches and wasting expert resources.

To test whether education could overcome these barriers, the team developed a targeted program for pupils aged 10 to 11 in České Budějovice, a South Bohemian city that the hornet has not yet reached but where its arrival is considered highly probable. Twenty classes took part between October and December 2024. The curriculum covered the hornet’s biology, its ecological and economic impacts, and its key identification features, with a strong emphasis on practical demonstration. Crucially, instead of photographs, the children examined real specimens embedded in transparent resin, including Vespa velutina workers and commonly confused native species such as the common wasp, the German wasp, and the European hornet. Handling resin-embedded insects avoided the fear or disgust that direct contact with stinging insects might provoke, while physical specimens helped prevent the misidentification errors that images alone can cause. A leaflet with a reporting telephone number was displayed in classrooms, and pupils without phones were encouraged to report sightings through their teachers.

The educational impact was measured rigorously. Pupils completed a short pre-test immediately before the program, the same test one week afterward, and a follow-up test two to three months later. Statistical analysis using repeated-measures ANOVA revealed a highly significant improvement in both knowledge scores and identification accuracy, with p-values below 0.001 in each case. Importantly, the gains were retained months later, indicating that the information had entered long-term memory. Before the program, awareness of the hornet was almost entirely limited to children already involved in beekeeping through their families. Afterward, the majority could correctly recognize the invasive species and distinguish it from its harmless native look-alikes.

The most striking test came six months after the program, in June 2025, when the researchers placed a dead Vespa velutina specimen on the classroom windowsill in participating schools. Fourteen of the twenty teachers consented to this covert experiment, and school staff were instructed not to alert pupils or remove the specimen during cleaning. The dead hornet sat in plain view for up to five consecutive days. In nine of the fourteen classes, or 64.3 percent, its presence was reported. Five classes reported it on the very first day, and four more the following day. In one memorable case, a pupil noticed the specimen on day one, took it home for careful examination overnight, and reported it to the teacher the next morning after confirming the identification. The scenario deliberately mimicked real-world conditions: the first recorded observation of the hornet in Austria in 2024 was a dead individual found on a hospital windowsill, and a hornet trapped indoors over a weekend would plausibly end up in exactly the same way.

Just as important as the successful detections was what did not happen next. Three months later, in September 2025, the researchers repeated the experiment with a dead European hornet, Vespa crabro, a large native vespid frequently mistaken for the invader. Not a single false report of Vespa velutina came in, either from the trained classes or from five additional classes that had not taken part in the earlier phase. The children had not merely learned to flag anything big and striped; they had learned the diagnostic features well enough to hold their fire when the wrong species appeared. This precision addresses one of the most persistent weaknesses of citizen science programs, in which floods of inaccurate reports raise verification costs and erode the value of public data.

The authors acknowledge limitations. The practical assessment ran in only fourteen classrooms, which constrained the original design of simultaneously testing the invasive and native species in different rooms. Because the control phase took place after the summer holidays, class compositions had shifted slightly, with most pupils retained but some turnover in a few classes. The study also tested recognition of dead specimens rather than flying hornets or individuals feeding on fruit, a constraint imposed by safety considerations and the need for a realistic simulation. Still, the researchers argue that June and September are comparable testing windows, since children are distracted at the end of the school year just as they are readjusting at the start of a new one, and attention to the hornet had already waned by the time of the June test.

The broader implications reach well beyond one Czech city. School-based programs are cheap, easy to implement, and can rapidly create hundreds of informed observers who understand the threat and know how to report it. Even if only a fraction of trained children remain vigilant over time, the sheer numbers involved mean that reliable reports could increase substantially, easing the shortage of citizen scientists and reducing the expert verification burden that drives up eradication costs. Involving children in a genuine, consequential task also boosts motivation and awareness, benefits that extend beyond biosecurity. The researchers recommend repeating such programs yearly, potentially woven into science curricula on invasive species, and deploying them urgently in Central European countries at the invasion front, such as Austria, Slovakia, and Hungary, as well as in the United States, New Zealand, and Mexico, where the hornet has arrived or is expected. In regions where the related and even more dangerous Asian giant hornet, Vespa mandarinia, is beginning to spread, educational content could cover both species. As warming climates push invasive hornets into new territory, the study suggests that the frontline of early detection may run straight through the classroom, where a modest investment in education can yield a distributed, accurate, and motivated detection network at almost no cost.

Subject of Research: School-based education programs for early detection of the invasive yellow-legged hornet Vespa velutina

Article Title: Children as frontline detectors: School-based programs can enhance early monitoring of Vespa velutina

Article References: Ditrich, T., & Lustová, Š. (2025). Children as frontline detectors: School-based programs can enhance early monitoring of Vespa velutina. NeoBiota, 104, 381-392. https://doi.org/10.3897/neobiota.104.174530

Image Credits: AI Generated

DOI: 10.3897/neobiota.104.174530

Keywords: Vespa velutina, yellow-legged hornet, invasive species, citizen science, early detection, school education, biological invasions, apiculture, pollinators, Czech Republic, species identification, eradication

The ecological logic behind the project is straightforward but consequential. Most wild pollinators, unlike honeybees, do not store large quantities of honey, so their populations are limited by the time of year when floral resources are scarcest. Some habitats, such as deciduous forests, concentrate flower production into a narrow burst, while others provide fewer resources over an extended period. Human-modified land uses complicate this picture further: mass-flowering crops concentrate flowering into an intense but limited window, urban environments can provide surprisingly important resources, and development creates new floral habitats such as roadside ditches. Any credible estimate of floral resources must therefore account for land use and land cover across a heterogeneous landscape, in both space and time.

The focal area spans Cayuga, Chemung, Cortland, Monroe, Onondaga, Ontario, Schuyler, Seneca, Tioga, Tompkins, Wayne and Yates counties, with dataset versions incorporating crop data for the years 2012 through 2019. The resulting land-cover layers allow users to quantify floral resources available within any user-specified area, for example a two-kilometre radius around the location of a bee hive. When paired with phenological data on the flowering plant communities associated with each land-cover class, users can predict pollinator floral resources over any specified period in the year.

The methodology is a carefully engineered combination of remote sensing-derived natural habitat, crop and land-use data products with roads GIS data. As a starting point, the team derived crop and other land-cover information from annual versions of the Cropland Data Layer, a raster dataset released by the US Department of Agriculture. Where that layer indicated natural vegetation, the researchers referenced the Terrestrial Habitat Map for the northeast US and Atlantic Canada, produced by The Nature Conservancy, to identify the natural habitat classification. Both layers are originally thirty-metre resolution, and mismatches between them were resolved by referring to the nearest Terrestrial Habitat class.

The land-cover classes of the final dataset aggregate crop and natural habitat classifications into categories narrow enough to capture major variation in floral characteristics yet coarse enough to allow feasible sampling with replication. Major annual and perennial crops that provide floral resources are indicated by their species. Other perennial crops are grouped together, reflecting a similar weed community resulting from the common practice of using mowed grass alleyways between crop rows. Remaining annual crop types fall into two general groups: insect-pollinated crops, which flower under cultivation, such as sunflower, and non-resource crops, which either do not produce insect-pollinated flowers ecologically, like wind-pollinated wheat, or are harvested before flowering, like broccoli. A separate winter-cover category captures non-resource crops sown in autumn to overwinter.

The real technical innovation lies in the downscaling. The team obtained one-metre resolution vegetation coverage data from the Land Cover Data Project of the Chesapeake Conservancy, a layer created from lidar data supplied by FEMA and the US Geological Survey, ortho-imagery from the National Agriculture Imagery Program, county-level planimetrics, statewide roads data and National Wetlands Inventory information. This high-resolution layer was available for nine of the twelve counties. Within it, vegetation is classified as trees or low vegetation, with additional classes for water and impervious surfaces; the researchers reclassified all impervious categories as no resource. The thirty-metre crop and habitat information was then downscaled to one-metre resolution, with wetland and waterbody delineations from the National Wetland Inventory inserted into the layer, using vegetation height classes to update wetland cells as emergent or shrub wetlands.

Roadside ditches, which can be an abundant source of floral resources for pollinators, posed a distinct challenge. Remotely sensing ditches from imagery requires very high resolution data and substantial analytical effort, so the team instead predicted likely flowering ditch locations from a New York State roads layer. Urban and suburban streets were systematically excluded: roads intersecting city and village boundaries were dropped, parking-lot roads were eliminated, and town roads lacking road in their name, such as streets, places, boulevards and avenues, were filtered out on the observation that such names denote urban streets rather than rural roads in the region. Along the remaining roads, ditches were simulated using a buffer from the road centre-line, with a width dependent on road type, assigning a ditch width of three metres, the average size in the study region, on each side. Portions intersecting water features were erased.

For the three counties without high-resolution vegetation data, Monroe, Seneca and Wayne, the team used an alternative approach to estimate lawn and urban tree coverage within developed areas. Conversion factors were calculated from the average relationship between two development intensity classes and the underlying proportion of lawn and urban tree coverage in the nine counties where one-metre data exist. Quality control was rigorous: contingency tables based on ten thousand randomly placed points compared the final land-cover class to the classes of the originating data layers. Agricultural classes were preserved with fidelity values above eighty percent, and in many cases above ninety percent, reflecting the homogeneity of agricultural areas. Natural areas showed lower fidelity, likely because these land covers are more heterogeneous and the one-metre vegetation data better reflect a mix of land-cover types. Shrubland, at forty-two percent fidelity, occurs prominently in areas classified as agricultural land in the TNC dataset, possibly indicating woody vegetation in old fields undergoing succession.

The output layers are stored as one-metre resolution rasters in the USA Contiguous Albers Equal Area Conic USGS projection, as sixteen-bit unsigned integer GeoTIFF files, with both dataset versions and the full ArcGIS ModelBuilder geoprocessing toolbox available on Zenodo under a CC BY 4.0 licence. The team also quantified the error of predicting lawn and urban tree cover in counties without high-resolution data, calculating the root mean square error between high-resolution coverage estimates and category-based predictions at one hundred randomly placed points in developed areas. Prediction accuracy improved with increasing buffer size, and the simpler category-based method is recommended over a continuous permeable-surface alternative that adds processing steps without improving accuracy.

The applications extend well beyond mapping for its own sake. The land-cover estimates can be combined with field data on flower phenology, abundance, size and community composition to understand landscape patterns in floral resources and associated bee abundance and richness over the growing season. They can also feed spatially explicit pollinator abundance models as floral availability scores. For beekeepers, the dataset offers a way to evaluate hive placements; for conservation practitioners, it can identify which habitat restoration efforts would most effectively boost native pollinator populations. The authors caution that the estimates are expected to be more accurate when aggregated over an area and should not be interpreted as a representation of on-the-ground conditions at any single pixel, and that the land-cover categories combine input classes based on similarities in flowering phenology, species composition and abundance, groupings that may not be appropriate outside this original purpose. An exhaustive field validation was beyond the scope of the project, though extensive accuracy assessments are available for many of the input layers, and the accuracy of predicted flowering ditch locations could be the subject of future research.

Subject of Research: Pollinator ecology, remote sensing and land-cover mapping in Central New York

Article Title: A map of pollinator floral resource habitats in the agricultural landscape of Central New York

Article References: Li, K., Fisher, J., Power, A., & Iverson, A. (2024). A map of pollinator floral resource habitats in the agricultural landscape of Central New York. One Ecosystem, 9, Article e118634. https://doi.org/10.3897/oneeco.9.e118634

Image Credits: AI Generated

DOI: 10.3897/oneeco.9.e118634

Keywords: pollinators, floral resources, land-cover mapping, remote sensing, Central New York, One Ecosystem, bee conservation, GIS, pollinator, floral, resource, habitats

The story began in 2018, when the study’s author conducted undergraduate fieldwork in the La Tatacoa Desert, a seasonally dry tropical forest ecosystem in the municipality of Villavieja. Over twelve months of sampling, the research analyzed how vegetation cover and seasonality shaped the diversity of native bees in this harsh environment. The results were striking: approximately 82 bee species were identified, with clear seasonal patterns and shifts in species composition between dry and rainy seasons and across different vegetation types. When combined with earlier inventory work that had documented new country records and even species new to science, the regional tally rose to 110 native bee species, roughly one fifth of all bee species known from Colombia.

That number surprised nearly everyone. Locals and tourists alike were skeptical that more than 80 bee species could survive in a landscape that appears almost lifeless compared with Colombia’s lush rain forests. This skepticism, rather than discouraging the project, became its catalyst. During a hot morning of bee collecting, two local brothers, Andrés and Rubén Vanegas, self-taught paleontologists whose childhood fossil collection had attracted the attention of the Smithsonian Tropical Research Institute and led to the formal establishment of the Tatacoa Natural History Museum, proposed dedicating a small section of their collection to bees. The researcher agreed, and what had begun as a conventional thesis project gained a second life as a public-facing exhibition.

The technical work behind the exhibition was substantial. After fieldwork concluded and the thesis earned its author a biology degree in 2019, the COVID-19 pandemic delayed the outreach phase through 2020 and the first half of 2021. Once back at the Biodiversity and Ecology of Wild Bees Lab at Universidad Militar Nueva Granada, where the collected specimens are officially housed, the team photographed bee specimens from La Tatacoa, including material from the earlier inventory project, and selected representative specimens for display. In total, 120 specimens representing 60 species were curated and permanently donated to the museum, organized into two Cornell-style entomological drawers. All 110 bee species recorded in the region were photographed and assembled into a large-format poster measuring 7.5 by 39.7 inches, designed to show details invisible to the naked eye in a group of insects that are often tiny and difficult to observe closely.

The exhibition opened on November 26, 2021, with a reception at the museum, which until then had been dedicated almost entirely to fossils. Dozens of residents from the rural community of La Victoria and local high school students attended a 20-minute talk on bee diversity and the role these insects play in dry forest ecosystems and crop pollination. Within days, photographs of the poster and the drawers were shared on social media, and the content went viral, reposted more than a thousand times in a single week. The story then crossed into national media when Radio Nacional de Colombia covered the research and the outreach effort, amplifying the message far beyond Huila: more than 110 bee species inhabit the Tatacoa Desert, and the arid landscape is far richer than it appears.

The viral moment translated directly into museum visits. In the weeks that followed, many visitors arrived drawn by the fossil exhibits but recognized the bee poster from social media, and some came specifically to see the bee display, still curious and skeptical that so many species could thrive in such an environment. The author notes that although official scientific reports had already documented the region’s high bee diversity, the exhibition proved instrumental in raising awareness among hundreds of visitors in a way that peer-reviewed publications never could. The experience highlighted a persistent gap in science: researchers publish primarily for other academics, using technical language, while outreach is often undervalued, perceived as low-status work carried out mainly by early-career researchers, disproportionately women.

Perhaps the most durable impact has been educational. A local teacher, Zamary Olaya, took the lead in promoting environmental education across Villavieja, and children in different grades now use the poster and the specimen collection to identify bees they observe and capture in their own backyards. With support from the local government, her initiatives have included creating a garden for bees and other pollinators planted with native flowers of La Tatacoa. Students cross-reference the collection, the poster, and online plant identification guides to recognize the most common plants and bees in the region, turning a museum drawer into a working field guide and grounding conservation in direct, personal experience with local species.

The museum itself has continued to evolve. By the end of 2024, still managed by the Vanegas brothers, the Tatacoa Natural History Museum earned an exhibit award from Parque Explora, an interactive science museum based in Medellín, which funded a renovation of its major exhibitions. The updated bee exhibit now features striking illustrations of native bees and plants from La Tatacoa, complementing the two display cases of specimens collected during the original research. Today, dozens of visitors explore the museum daily, leaving with an appreciation for both the ancient biodiversity preserved in the region’s fossils and the living diversity that persists in its dry forest.

From this case, the author distills two practical recommendations for researchers. First, every fieldwork-based project should incorporate the social needs and perspectives of local communities, whose generational knowledge of the landscape can enrich research design, improve site selection, and anchor conservation efforts in local stewardship. Second, visual media and social networks should be treated as core scientific tools rather than afterthoughts; engaging infographics and photographs can dramatically broaden the reach of research findings and improve public understanding of topics that are difficult to grasp from technical papers alone.

The broader lesson is one that resonates far beyond entomology. Scientific knowledge confined to journals rarely changes how people perceive the places they live, but accessible, visually engaging formats can bridge the gap between academic research and societal awareness. A pair of wooden drawers, a large poster, and a well-timed social media post turned a regional biodiversity survey into a community conservation movement in one of Colombia’s most threatened ecosystems. When knowledge is presented clearly and attractively, the study concludes, it can transcend academic boundaries and become a catalyst for environmental awareness, proving that the distance between a data table and a viral phenomenon is shorter, and more consequential, than most researchers assume.

Subject of Research: Public engagement with native bee biodiversity through museum outreach in Colombia

Article Title: Outreach drawer collections and visual science communication enhance public engagement with native bee diversity in Colombia

Article References: Herrera-Motta, A. F. (2025). Outreach drawer collections and visual science communication enhance public engagement with native bee diversity in Colombia. Natural History Collections and Museomics, 2, 1-8. https://doi.org/10.3897/nhcm.2.157562

Image Credits: AI Generated

DOI: 10.3897/nhcm.2.157562

Keywords: native bees, La Tatacoa Desert, Colombia, science communication, entomological exhibition, natural history museum, biodiversity, pollinators, tropical dry forest, community engagement, social media, conservation education

Microplastics, defined as plastic particles smaller than five millimeters, have become one of the most pervasive environmental contaminants on the planet. Generated by the fragmentation of larger plastic waste, they now contaminate soil, water, and air, and they have been detected inside living organisms, including humans, in blood and everyday consumer products. Bees are particularly effective bioindicators of this contamination because their foraging behavior forces them into constant contact with environmental surfaces. As they visit flowers, collect nectar and pollen, and return to the hive, electrostatic charges on their hairy bodies attract and retain airborne and surface-deposited particles, effectively turning each bee into a mobile pollution monitor.

The threat that microplastics pose to pollinators is not merely theoretical. Previous research has documented a spectrum of acute, chronic, and sublethal effects. Ingested particles can obstruct the digestive tract, reduce nutrient absorption, and in severe cases cause death. Fibers and sharp fragments can lodge in respiratory passages or physically damage wings and legs, hindering movement and foraging efficiency. Over the longer term, exposure has been linked to reduced egg laying, lower offspring viability, weakened immune systems, and altered behaviors such as difficulty navigating back to the hive. Because bees pollinate crops and wild plants alike, these effects ripple through agriculture and ecosystem health, and microplastics can bioaccumulate in food chains that include humans.

Earlier studies had already detected microplastics in bees and honey around the world, including in Denmark, where bees from urban, suburban, and rural sites all tested positive, and investigations had suggested that polystyrene ingestion could increase bees’ susceptibility to viral infections by disrupting their gut microbiota. Work in Ecuador itself had found synthetic fragments and fibers in at least 12 percent of commonly consumed beverages, including milk, honey, and beer, and had documented heavy microplastic contamination in the coastal waters of Esmeraldas province. What remained missing was a systematic test, in the southern Ecuadorian highlands, of whether proximity to human settlements actually predicts the plastic load carried by bees.

The research team, working with laboratories at the Salesian Polytechnic University in Cuenca, focused on nine peri-urban apiaries distributed around the city of Gualaceo, an urban core of roughly 13,981 inhabitants located in the Santa Bárbara river valley. The participating apiaries spanned sites to the north, south, east, and west of the city, all within the transitional zone where agricultural and residential land uses blend. With the voluntary collaboration of local beekeepers, the researchers collected approximately 50 dead worker bees from around three hives at each apiary over the course of about a month, repeating the sampling after 15 days. Samples were sealed in glass jars, refrigerated, frozen, and transported to the laboratory for analysis in the penultimate quarter of 2022.

The laboratory protocol was deliberately meticulous to prevent contamination and false positives. In a laminar flow hood, bee bodies were gently agitated for 15 minutes in a solution of ethanol and ultrapure Milli-Q water to dislodge adhered particles. The resulting suspension was vacuum-filtered through 11-micrometer paper, then digested with 33 percent hydrogen peroxide at 60 degrees Celsius for 24 hours to strip away organic matter. Microplastics were then captured on 0.45-micrometer cellulose nitrate membranes and stained with Nile red, a fluorescent dye whose solvatochromic properties make it bind preferentially to hydrophobic plastic particles, allowing rapid visual discrimination of plastics from other debris. A Nikon Eclipse Ti2 inverted fluorescence microscope, operating with green-filter excitation at 430 to 490 nanometers, was used to count and measure fibers and fragments on filters divided into four quadrants.

Chemical confirmation came from Fourier Transform Infrared (FTIR) spectroscopy using attenuated total reflectance with a diamond crystal, scanning wavelengths from 400 to 4000 inverse centimeters and comparing each particle’s spectrum against polymer reference libraries such as the Hummel Polymer and Additives databases. Only matches exceeding 70 percent similarity were accepted. The results were sobering: out of 1269 polymeric particles initially observed across all samples, 583 were fragments and 686 were fibers, yielding an overall average of 24 microplastics per 50 bees. The most contaminated hive averaged 57 particles per 50 bees, while the least contaminated registered 10. Fragment diameters ranged from 5.63 to 1834.69 micrometers, and fiber lengths from 6.65 to 4980.57 micrometers, with fibers making up 54.06 percent of the total load.

FTIR analysis of 341 identified particles revealed a diverse polymer cocktail spanning 23 synthetic types. Poly(4-methylcaprolactam) dominated at 25.29 percent of identified particles, followed by Nylon 12 and polyethylene at 11.73 percent each, ethylene propylene diene monomer at 9.9 percent, polytetrafluoroethylene at 6.45 percent, and polyamide 8 and polycarbonate at 4.4 percent each, with polyethylene terephthalate, better known as PET, appearing at 3.23 percent. These seven polymer types alone accounted for nearly 74 percent of all identified particles. Notably, PET was detected at almost every site, underscoring how thoroughly plastic waste from packaging and textiles has penetrated the peri-urban environment. The authors caution that fluorescence microscopy is more sensitive to very small particles than FTIR, whose lower spatial resolution limits detection, which is why the two techniques were used in complementary fashion to filter out false positives and build a robust picture of contamination.

The statistical core of the study addressed the central hypothesis directly. Because initial data violated the normality assumptions of analysis of variance, the researchers applied a Box-Cox procedure, settling on a logarithmic transformation that normalized residuals and validated the model. A Welch ANOVA then confirmed significant differences in microplastic loads among the nine apiaries, and Games-Howell post hoc tests pinpointed significant contrasts between the most contaminated site and six others. Finally, linear regression against distance from the Gualaceo urban center revealed a statistically significant negative relationship: the fitted equation was logarithm of microplastic concentration equal to 4.34 minus 0.52 times distance. The slope of minus 0.5256 was significantly different from zero, and the model explained approximately 47.6 percent of the variability in contamination levels, a moderate correlation the authors attribute partly to the modest sample size of nine apiaries.

The implications extend well beyond Ecuador. The study confirms that no area, even a small highland city far from industrial mega-centers, is immune to microplastic contamination, and it quantifies how urban centers function as pollution sources whose influence decays with distance. It also raises urgent questions about whether microplastics are being incorporated into honey and other bee products, and what that means for consumers, a question the researchers flag as a priority for future work. The team frames its findings as a call for action at individual and institutional levels alike, arguing that effective environmental policies and engineering solutions for waste management must keep pace with the sheer volume of plastic now fragmenting into the environment. If bees, the sentinels flying at the interface between human landscapes and natural ecosystems, are this heavily contaminated on the outskirts of a mid-sized Andean town, the global scale of the problem becomes difficult to ignore.

Subject of Research: Microplastic contamination of honeybees in relation to distance from urban centers in Ecuador

Article Title: Influence of Geographic Separation Between Urban Centers and Microplastic Burden on Bees ( Apis mellifera )

Article References: Arévalo, P. W., Orellana, V. P., Brito López, P. G., & Cajamarca, X. J. (2024). Influence of Geographic Separation Between Urban Centers and Microplastic Burden on Bees (Apis mellifera). One Ecosystem, 9, Article e127698. https://doi.org/10.3897/oneeco.9.e127698

Image Credits: AI Generated

DOI: 10.3897/oneeco.9.e127698

Keywords: microplastics, honeybees, Apis mellifera, pollinators, Ecuador, urban pollution, bioindicators, FTIR spectroscopy, fluorescence microscopy, plastic pollution, environmental monitoring, Influence

The study, published in the journal BioRisk, aimed to measure the occurrence of spontaneous self-pollination in Lavandula angustifolia and to identify the specific external pollinators responsible for fruit set. Field experiments were performed at two distinct sites: a lavender plantation near Gorna Lipnitza Village in north Bulgaria and the ex-situ lavender collection in the experimental plot of the Botanical Garden of Sofia University. The researchers selected these locations to capture a range of environmental conditions and pollinator communities. By excluding external pollinators from selected inflorescences and comparing them to control groups, the team sought to determine whether the plant could reproduce without insect assistance. This experimental design allowed for a rigorous assessment of the plant’s reproductive biology and its dependence on ecological interactions.

The results of the self-pollination test were definitive. In the experimental plot, the fruit set of all flowers from which pollinators were excluded was zero percent, whereas the control group, which was free to be pollinated, achieved a fruit set of 85.9 percent. This stark contrast strongly suggests a complete absence of spontaneous self-pollination in the studied Lavandula angustifolia plants. The plant possesses several biological adaptations to avoid self-fertilization, including heterostyly, genetic self-incompatibility, and cytoplasmic male sterility. These mechanisms ensure that cross-pollination is the primary mode of reproduction, making the presence of effective pollen vectors a prerequisite for seed production and, consequently, for the maintenance of the plant’s reproductive cycle.

Observations of pollinator activity revealed that bumblebees were the dominant visitors at both study sites, followed by honeybees. In the Botanical Garden, the average activity index for bumblebees was 5.08, compared to 1.14 for honeybees. At the Gorna Lipnitza plantation, the disparity was even more pronounced, with bumblebees recording an average activity index of 7.4 and honeybees at 4.9. This dominance is not surprising given the foraging behaviors of these insects. Bumblebees are polylectic foragers with longer tongues, allowing them to access nectar more efficiently and process lavender flowers up to three times faster than honeybees. Their ability to consolidate pollen adhering to their bodies into full pollen baskets further indicates their active role in pollen transfer, making them highly efficient pollinators for this specific crop.

While bees were the primary pollinators, the study also documented the presence of various other insect groups, including butterflies, moths, bee-flies, and beetles. Species such as Macroglossum stellatarum, a fast-flying hawkmoth, were observed hovering in mid-air to probe flowers for nectar. Other butterflies, including Plebejus argus and Pieris rapae, also visited the lavender, though their contribution to pollination was likely limited. Research indicates that many of these Lepidoptera species carry significantly fewer pollen grains compared to bees, with some functioning more as nectar thieves than effective pollen vectors. The spatial distribution of certain butterflies, such as Plebejus argus, is also constrained by the presence of host ant colonies, further limiting their role as consistent pollinators in agricultural settings.

The economic implications of these findings are significant for lavender growers. It has been demonstrated that the greatest quantity of essential oil is obtained near the end of the inflorescence anthesis, and this quantity is directly correlated with pollination success. Unpollinated flowers tend to drop, reducing the total biomass available for oil extraction. Furthermore, oil quality is highest at the end of the flowering period, a phenomenon related to the gradual increase of monoterpenes, particularly the valuable linalool, and the decrease of sesquiterpenes during flower ontogenesis. This chemical shift underscores the importance of ensuring that flowers are successfully pollinated to achieve both high yield and superior aromatic quality, which are critical for the commercial value of the final product.

Traditionally, lavender growers have placed beehives in their fields to ensure optimal essential oil production, relying on managed honeybee colonies to provide pollination services. However, this study highlights that wild pollinators, particularly bumblebees, play a crucial and often dominant role in the pollination of Lavandula angustifolia. The reliance on honeybees alone may be insufficient to maximize yield and quality, especially in regions where wild bee populations are robust. The findings suggest that a holistic approach to pollinator management is necessary, one that integrates the conservation of wild pollinator habitats with the use of managed bee colonies. This dual strategy could enhance the resilience of pollination services and improve the overall productivity of lavender crops.

The broader context of pollinator decline adds urgency to these findings. Negative non-target effects of pesticides and habitat loss have led to significant declines in insect populations, particularly in areas of intensive agriculture. This pollinator crisis demands action at multiple geographic and political levels, with a focus on science-based conservation strategies. In countries like Bulgaria, where baseline data on the status and population trends of wild pollinators are currently lacking, ongoing monitoring is essential. Understanding the specific roles of different pollinator species allows for more targeted conservation efforts and better-informed agricultural practices. By recognizing the value of wild pollinators, growers can contribute to both the sustainability of their crops and the preservation of local biodiversity.

In conclusion, the study provides compelling evidence that Lavandula angustifolia requires insect pollen vectors for fruit set and that wild bumblebees are the most efficient pollinators for this species. The absence of spontaneous self-pollination underscores the plant’s dependence on ecological interactions for reproduction. As the global demand for lavender essential oil continues to grow, the need for sustainable pollination strategies becomes increasingly apparent. By conserving wild pollinator populations and integrating them into agricultural management plans, growers can ensure optimal essential oil production while supporting the health of local ecosystems. This research serves as a call to action for both the scientific community and the agricultural sector to prioritize the protection of pollinators in the face of ongoing environmental challenges.

Subject of Research: Pollinators of Lavandula angustifolia Mill., an important factor for optimal production of lavender essential oil

Article Title: Pollinators of Lavandula angustifolia Mill., an important factor for optimal production of lavender essential oil

Article References: Valchev, H., Kolev, Z., Stoykova, B., & Kozuharova, E. (2022). Pollinators of Lavandula angustifolia Mill., an important factor for optimal production of lavender essential oil. BioRisk, 17, 297-307. https://doi.org/10.3897/biorisk.17.77364

Image Credits: AI Generated

DOI: 10.3897/biorisk.17.77364

Keywords: Pollinators, Lavandula, angustifolia, Mill, important, factor, optimal, production, lavender, essential, scientific research