Southern Italy’s Bird List Soars: 43 New Species Recorded in Calabria

A quiet revolution has been taking place in the mountains, wetlands and coastlines of Calabria, the toe of the Italian boot. Ornithologists have just published the first complete update of the region’s bird checklist in more than three decades, and the results are striking: 363 species and nine subspecies are now confirmed for the region, an increase of 43 species over the previous tally of 320 published in 1993. The new checklist, revised through 31 December 2025 and published in the Biodiversity Data Journal, is the product of a decade of intensified fieldwork, standardised bird ringing and a surge of collaboration among local observers, now coordinated by the Stazione Ornitologica Calabrese (StOrCal).

For a region that had gone largely without a synthetic avifaunistic update since Scebba and colleagues compiled the first checklist in 1993, the new numbers represent far more than an accounting exercise. The compilation critically integrates peer-reviewed papers, technical reports, theses, ringing bulletins and conference proceedings, alongside records from the citizen-science platforms ORNITHO.it, eBird and iNaturalist. Unpublished observations contributed by members of StOrCal and the wider regional birdwatching community were accepted only after an internal, case-by-case review of the evidence, and rare or unusual records were admitted only when validated by the Italian Rarities Committee.

The methodological rigour underpinning the list is considerable. Every taxon included had to be supported by at least one of five forms of evidence: a published reference in the peer-reviewed or grey literature, a museum specimen with verifiable collection data, a photograph, video or audio recording archived in a public repository, a ringed individual with full ringing data, or detailed field notes from experienced observers, especially when corroborated by independent records. Records judged insufficiently documented were excluded outright, and a handful of historical entries carried over from the 1993 checklist without precise dates or localities were transparently flagged for future re-evaluation. Taxonomy and status coding follow the national CISO–COI checklist of Italian birds, while English common names are aligned with the Global Avian Checklist.

Of the 363 species now on the books, 336 belong to AERC category A, meaning they are of apparently wild origin and have been recorded since 1950. Twelve species are category B, known only from historical records before 1950, seven are category C, introduced species with self-sustaining populations, five fall into the intermediate category AC, and three are category E escapes. The authors assigned general status codes to 258 regular species, 20 irregular ones, 64 accidental or vagrant species and 21 historical species, while breeding status was confirmed for 143 regularly breeding species, eight irregular breeders, three occasional breeders and four former breeders that no longer reproduce in the region.

Perhaps the most biologically revealing finding is what the 43 new species have in common. A striking 35 of them, some 81 percent, are classified as accidental or vagrant, meaning that most of the increase reflects improved observer coverage and better documentation of rare visitors rather than genuine range expansions. The new entries span 12 orders, led by passerines with 15 species, followed by shorebirds and allies with eight and waterfowl with seven. At the family level, ducks and geese (Anatidae) contributed seven new species, while sandpipers (Scolopacidae) and leaf warblers (Phylloscopidae) added four each.

The biogeographic story told by these vagrants is remarkable. Calabria sits astride the central Mediterranean migratory flyway, wedged between the Tyrrhenian and Ionian seas and facing Sicily and the African continent, and the new records show that the region acts as a convergence point for multiple migration systems. Roughly a quarter of the newly reported taxa are of Siberian or central Asian origin, including species such as the yellow-browed warbler, dusky warbler, red-flanked bluetail and eye-browed thrush. Another quarter come from Africa or the Middle East, and smaller but significant fractions hail from Arctic and northern Europe, as well as a single Nearctic visitor, the American buff-breasted sandpiper. Many of these Siberian wanderers would almost certainly have gone undetected without targeted constant-effort ringing at coastal stations such as Punta Alice in the province of Crotone and San Michele di Cetraro in Cosenza.

Among the genuine breeding news, one record stands out as a headline in its own right. The African plain martin-like swift known as the Caesar’s swift relative, Apus caffer, the red-rumped swift’s smaller cousin more typically associated with the Iberian Peninsula and Africa, has been confirmed nesting irregularly at an inland site in the province of Crotone. This represents the first documented breeding of the species anywhere in Italy and in the entire central Mediterranean Basin, and the authors describe Calabria as a putative bridgehead for Afro-Iberian taxa colonising Europe. Other breeding additions include the regional colonisation by the yellow-legged gull as a regular breeder, occasional nesting by the western swamphen and the naturalisation of the ring-necked parakeet, an introduced species now breeding irregularly.

The conservation picture that emerges from the checklist is sobering. A total of 125 species, about a third of the regional avifauna, are listed in Annex I of the EU Birds Directive, underlining the European importance of Calabria’s birds. National IUCN categories are known for 230 species, and among these, nine are Critically Endangered, 21 are Endangered and 32 are Vulnerable. The Critically Endangered species are dominated by wetland-dependent birds such as the spotted crake, little crake, black tern, sedge warbler and reed bunting, alongside emblematic raptors including the osprey, bearded vulture and Egyptian vulture, and the barred warbler of open scrub habitats. This pattern reflects the vulnerability of Calabria’s limited and fragmented network of coastal and inland wetlands, as well as the precarious state of its cliff-nesting and scavenging birds of prey. The region’s 185 Natura 2000 sites, covering roughly 19 percent of its territory, only partially overlap with the key sites for these taxa, and the authors caution that conservation effectiveness varies considerably across sites.

Contextualising the numbers against neighbouring territories reveals both how much Calabria has to offer and how much remains to be discovered. Sicily, with a much longer ornithological tradition and a larger surface area, has recorded 437 species since the mid-nineteenth century, while even the small island of Pantelleria in the Sicilian Channel has accumulated 261 species under sustained observer effort. The Italian national checklist comprises 551 species, meaning that Calabria now holds roughly two-thirds of the country’s entire avian diversity, a proportion broadly in line with the region’s extent and remarkable habitat heterogeneity, which ranges from sea level to the 2,267-metre summit of Serra Dolcedorme in the Pollino Massif, and from beech and Calabrian black pine forests to coastal wetlands and river mouths along 789 kilometres of coastline.

The authors are candid about the gaps that remain. Inland mountain areas such as the Pollino, the Sila Plateau and the Aspromonte are still under-surveyed compared with the coast, standardised data on breeding densities and population trends are lacking for most species, and pelagic seabirds, nocturnal migrants and high-altitude breeders all deserve dedicated monitoring programmes. The natural next step, they argue, is a regional breeding bird atlas based on standardised square surveys, complemented by coordinated wintering counts at coastal wetlands, an expanded network of constant-effort ringing stations, and deeper integration with national citizen-science platforms under quality-controlled validation. With the checklist dataset openly available on Zenodo, and with regional observers now organised under shared methodological standards, Calabria’s birds finally have the documented, verifiable baseline they need, and the stage is set for the next three decades of discovery at Europe’s southern gateway.

Subject of Research: Updated checklist of the bird species of Calabria, southern Italy

Article Title: Updated checklist of the birds of Calabria (southern Italy)

Article References: Urso, S., Martino, G., Muscianese, E., Policastrese, M., Pucci, M., Vena, M., & Storino, P. (2026). Updated checklist of the birds of Calabria (southern Italy). Biodiversity Data Journal, 14, Article e195967. https://doi.org/10.3897/bdj.14.e195967

Image Credits: AI Generated

DOI: 10.3897/BDJ.14.e195967

Keywords: Calabria, ornithology, bird checklist, biodiversity, vagrancy, migration, citizen science, bird ringing, conservation, IUCN Red List, Mediterranean flyway, Natura 2000