Killer Cats: Predators of Billions


According to a new study published in Nature Communications has indicated that cats kill somewhere between 1.4 and 3.7 billion birds and 6.9 to 20.7 billion mammals annually. And though the authors admit that stay and feral cats are the biggest killers, Fluffy certainly isn’t innocent.

Cats kill more animals per year than road accidents, building collisions, or poisonings. Already fragile island ecosystems and wildlife are especially perturbed by cats, domestic or otherwise, which “have been blamed for the global extinction of 33 species,” according to BBC.

Previous estimations of cat killings were at less than a quarter of what this new study found. Birds are the most likely to be killed, along with rodents like mice, shrews, voles, squirrels, and rabbits.

Cats are “likely the single greatest source of anthropogenic mortality for U.S. birds and mammals,” reads the abstract from the Nature Communications study. “Scientifically sound conservation and policy intervention is needed to reduce this impact.”

The easiest way to start reigning in this number is to actively work to reduce the number of stray and feral cats by spaying and neutering them. Doing so will prevent wild felines from reproducing and will slowly whittle down the population. Seeing as wild cats kill about three times as many animals as domestic ones, this could make a huge impact. Many veterinarians and humane societies will provide spaying and neutering services for free to good Samaritans who bring in strays.

Domestic cat owners can help by keeping pet cats indoors more than outdoors, where they will have free reign over local wildlife. For those owners who prefer to keep their cats outside, investing in a fitted collar and bell could help alert wildlife to the cat’s presence and reduce the number of successful kills.

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