Canada geese are real-life gangsters. They are large, bold, highly adaptable and thrive in urban landscapes. Wherever they go, they leave their distinctive signature: cigar-shaped green feces.

The population of Canada geese has expanded rapidly in many North American cities, thanks to favourable urban environments — with abundant food from lawns, safe nesting sites and few predators — and supportive conservation actions over the past three decades.

These geese are indeed adorable, but in large numbers they can become a nuisance. They damage crops and compete with other water birds. They produce feces that are unpleasant to step on and carry pathogens — contaminating lawns and leading to the ecological collapse of water bodies.

A single goose can defecate every 20 minutes. Now, imagine how much fecal matter is produced every day by hundreds or thousands of geese in a city. There have been almost no efforts to explore beneficial uses for this waste.

Our research findings, published in the Journal of Environmental Management, suggest that goose poop could be used to create both a source of protein for animal feed and an agricultural fertilizer — using one of nature’s recycling powerhouses, the black soldier fly.

Goose feces to create poultry feed

The larvae of the black soldier fly are........

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