Quantifying outdoor cat predation using animal-borne cameras
Domestic cats (Felis catus) are estimated to kill between 1–4 billion birds and 6–23 billion mammals per year in the United States and between 100-350 million birds per year in Canada. However, as shown by their fourfold estimate ranges, these staggering estimates contain a high degree of uncertainty and little is known about the specific composition of prey taken. For my doctoral degree, I will use custom-designed, miniaturized, animal-borne cameras (“CatCams”) to estimate predation rates and prey composition of outdoor domestic cats in two ecologically distinct urban ecosystems. Field-tested CatCams will provide a unique cat’s eye view of the world, allowing me to accurately estimate predation rates and identify the type of prey killed by cats. I will also build multi-predictor models to determine factors that assess variation in predation rates.
Publications
Chu, J. J., Norris, D. R., Bourque, J., Roy, C., Wilson, O., & Gow, E. A. (2025). An updated estimate of the number of birds killed by outdoor cats in Canada. Avian Conservation and Ecology, 20(2):12. https://doi.org/10.5751/ACE-02926-200212
