The study explores the potential for black soldier fly larvae to convert goose feces—a resource abundant in urban settings—into valuable byproducts such as protein-rich biomass and nutrient-dense fertilizer. This novel approach addresses two pressing issues simultaneously: mitigating the environmental impact of prolific goose populations and creating sustainable products that support circular agricultural practices. The black soldier fly (Hermetia illucens), already extensively used in waste conversion and animal feed production, exhibits remarkable adaptability to various organic substrates, making it a promising agent for goose waste bioconversion.

Initial investigations quantified the relationship between Canada goose abundance and fecal deposition at multiple urban sites across southern Quebec and Ontario. Researchers demonstrated a clear positive correlation, underscoring the rapid accumulation of fecal matter in public greenspaces frequented by these birds. Such accumulation not only deteriorates recreational environments but also poses risks of nutrient overload and bacterial contamination in adjacent water bodies, potentiating eutrophication and habitat degradation.

Laboratory trials then assessed the developmental performance of black soldier fly larvae when fed distinct diets, including a conventional Gainesville diet (a mix of wheat bran, alfalfa, and corn meal), pure goose feces, and a 50-50 mixture of the two. Larvae consuming the hybrid diet exhibited superior growth rates, survival probabilities, and waste conversion efficiency compared to those fed exclusively on goose feces or the standard feed. This finding suggests that dietary diversity enhances larval health and accelerates organic waste breakdown, optimizing bioconversion outcomes.

Interestingly, larvae reared solely on goose feces displayed slower developmental progress, reduced survival, and smaller adult sizes, indicating the limitations of feces as a singular nutrient source. Nonetheless, the fact that larvae could subsist and significantly reduce waste mass on this diet alone confirms the feasibility of using goose droppings as a viable substrate. This is particularly relevant in urban management scenarios where feed supplementation for larvae may be logistically constrained.

Another compelling dimension of the study investigated the influence of microbial communities present in the feces on larval growth. By comparing larvae raised on autoclaved (sterilized) droppings versus raw feces, the researchers found notable disparities. Autoclaving eliminated beneficial microbiota, resulting in reduced larval consumption, smaller adult mass, and shortened lifespan on the feces-only diet. This unveils the critical role of symbiotic microorganisms in facilitating efficient nutrient assimilation and larval development, a nuance vital to scaling the bioconversion process.

Beyond larval growth, the study examined the utility of frass—the residual insect waste generated after larvae consume organic matter—as a biofertilizer. Using duckweed (Lemna minor), an aquatic plant esteemed for its rapid growth and multifunctional applications in feed, bioenergy, and wastewater treatment, as a model crop, researchers evaluated fertilization efficacy. Remarkably, duckweed treated with goose feces-derived frass outperformed counterparts receiving a standard nutrient solution or fresh feces, exhibiting a 32% increase in biomass yield and morphological traits indicative of optimal nutrient availability.

This remarkable enhancement of plant growth by frass highlights a closed-loop opportunity wherein urban goose feces are transformed into high-value inputs for sustainable plant production systems. Such circular waste management strategies not only alleviate sanitation concerns in public spaces by removing vast quantities of avian feces but also generate renewable biomass resources. The resultant products can serve as cost-effective alternatives to traditional compost, synthetic fertilizers, and even conventional animal feed ingredients.

The implications for urban ecology and agricultural sustainability are profound. Managers of parks, recreational areas, and peri-urban farms could adopt black soldier fly-based bioconversion systems to mitigate environmental pollution while creating feedstock and fertilizer locally. Moreover, this method could prove particularly advantageous in remote areas lacking infrastructure for conventional waste management, introducing a low-tech, scalable solution aligned with principles of sustainability.

Despite these promising findings, the researchers emphasize the necessity for further investigation before industrial-scale implementation. Considerations such as optimizing larval diets, ensuring biosecurity, evaluating long-term ecological impacts, and integrating with existing waste management frameworks remain priorities. Nonetheless, this pioneering study paves the way for inventive approaches to managing challenges posed by superabundant wildlife species in human-dominated landscapes.

The interdisciplinary team, led by assistant professor Rassim Khelifa of Concordia’s Department of Biology and including master’s student Carlos López-Manzano as first author, underscores the potential of coupling entomology with urban ecology to devise impactful environmental interventions. Supported by the Natural Sciences and Engineering Research Council of Canada, their work extends beyond academic inquiry, offering practical solutions that resonate with global imperatives to promote circular economies and safeguard ecosystems.

As global urbanization intensifies, human-wildlife interactions will increasingly require innovative management to balance ecological health with societal needs. This study exemplifies how leveraging biological agents like the black soldier fly can convert ecological challenges into opportunities for sustainability, embodying a future where urban waste streams become valuable resources rather than liabilities.

Subject of Research: Animals
Article Title: Using an insect for sustainable waste management of a superabundant bird
News Publication Date: 19-Feb-2026
Web References: https://www.sciencedirect.com/science/article/pii/S0301479726003798
References: López-Manzano, C., Khelifa, R., Mahdjou, H., Arce-Valdés, L.R. (2026). Using an insect for sustainable waste management of a superabundant bird. Journal of Environmental Management, DOI: 10.1016/j.jenvman.2026.128919
Image Credits: Concordia University

Keywords: Wildlife, Fertilizers, Sustainable agriculture, Wetlands, Migratory birds, Wild birds

In the era of rampant food waste, the potential of utilizing side streams from food production processes is immense. Approximately one-third of food produced globally goes to waste, presenting both an environmental challenge and an opportunity for resource recovery. The study emphasizes the necessity for sustainable practices that can transform this organic waste into useful bioresources. This aligns with the principles of a circular economy, where waste materials are continuously repurposed to minimize environmental impact.

BSF larvae are renowned for their efficiency in degrading organic matter. The larvae thrive on a variety of organic waste, making them ideal candidates for bioconversion processes. The research presents a comprehensive analysis of how these larvae can be integrated into existing food production systems to implement a co-addition strategy. This strategy ensures that waste materials are not merely disposed of but are instead transformed into high-quality feed for aquaculture, poultry, and other livestock, thereby reducing reliance on conventional feed sources.

One of the most remarkable aspects of the study is the nutritional profile of the biomass produced by BSF larvae. The larvae are rich in protein, essential amino acids, and fatty acids, which are vital for animal growth and health. The integration of BSF larvae into animal feed can significantly improve the sustainability of livestock production by providing an alternative feed source that reduces the need for fishmeal and soybean, both of which have substantial environmental footprints.

Moreover, the implications of this research extend beyond just animal nutrition. By incorporating a variety of food waste types into the larval diet, the study reveals that BSF can efficiently convert diverse organic materials into high-quality biomass. This versatility offers a dual benefit: it manages different streams of food waste and produces a nutrient-dense resource. The findings contribute to the ongoing discourse on waste management and resource recovery, providing a viable solution to mitigate the issue of food waste while addressing nutritional needs in livestock production.

The research also addresses potential concerns regarding the safety and quality of the BSF larvae-derived biomass. Detailed assessments of the larvae’s capacity to accumulate potential contaminants and heavy metals pose crucial questions in the context of food chain safety. The authors recommend comprehensive monitoring and adherence to safety standards to ensure that the biomass produced is not only sustainable but also safe for animal consumption.

In light of climate change and growing global populations, the research stresses the urgency for innovative solutions that can bolster food security while mitigating environmental impact. The study underscores the importance of interdisciplinary approaches that combine waste management, agriculture, and environmental science to develop holistic solutions for food production. Adopting BSF larvae not only aligns with environmental goals but also promotes economic resilience in the agricultural sector.

The study by Shen et al. serves as a clarion call for agro-industries to rethink waste management practices. By emphasizing a biocircular approach, the authors highlight the potential of turning waste into resources, setting the stage for future investments in sustainable agriculture. The implications of this research beckon collaboration between researchers, policy-makers, and industry stakeholders to pave the way for large-scale adoption of BSF larvae technology.

It is also essential to consider the scalability of implementing BSF larvae systems in diverse agricultural settings. The research presents insights into managing the cultivation of these larvae, ensuring they can be integrated efficiently into existing production systems. The exploration of optimal conditions for larval growth and conversion rates demonstrates the feasibility of large-scale applications in various contexts, from urban waste management to rural farm practices.

Furthermore, the economic benefits of adopting BSF larvae production are significant. The production of BSF larvae can create job opportunities within communities, contributing to economic development in rural areas while also providing a sustainable source of protein for animal feed. The study encourages local farmers and entrepreneurs to explore this innovative avenue as a means of enhancing their productivity and reducing waste.

Overall, this pioneering research highlights the multifaceted benefits of employing Black Soldier Fly larvae in a sustainable, biocircular approach to valorizing food production side streams. The authors provide a roadmap for harnessing the power of nature to solve pressing global challenges. It is a call to action for the scientific community, industry leaders, and policy-makers to collaborate and innovate around sustainable waste management solutions that support both ecological integrity and food security.

As the world grapples with the interconnected issues of waste, food security, and environmental degradation, studies like this illuminate the path forward. The transformation of food waste into valuable resources, powered by the efficiency of BSF larvae, could redefine food production systems. By embracing environmentally friendly practices rooted in science, society can move closer to achieving a truly sustainable future, one where food waste is no longer a burden, but a resource for growth.

In conclusion, the biocircular strategy presented by Shen et al. represents a significant leap toward sustainability in agriculture. By bridging the gap between waste management and resource recovery, the study not only addresses an immediate problem but also sets a precedent for future research and applications in agro-ecology and environmental science. The collaboration between various stakeholders will be essential to realize the full potential of this innovative approach and drive it to a wider audience. The time for action is now, and the insights gained from this research could be instrumental in shaping future policies and practices toward a sustainable food system.

Subject of Research: Valorizing food production side streams through Black Soldier Fly larvae.

Article Title: A Sustainable Biocircular Approach of Valorizing Food Production Side Streams by Black Soldier Fly Larvae in a Co-addition Strategy.

Article References:

Shen, K., Fan, S., Jiang, S. et al. A Sustainable Biocircular Approach of Valorizing Food Production Side Streams by Black Soldier Fly Larvae in a Co-addition Strategy. Waste Biomass Valor (2025). https://doi.org/10.1007/s12649-025-03377-y

Image Credits: AI Generated

DOI: https://doi.org/10.1007/s12649-025-03377-y

Keywords: Black Soldier Fly, biocircular economy, food waste valorization, sustainable agriculture, protein production.