Exact numbers are unknown, but scientists estimate that every year in the United States alone, cats kill hundreds of millions of birds, and more than a billion small mammals, including rabbits, squirrels, and chipmunks. Feline predators include both domestic cats that spend time outdoors and stray cats that live in the wild.
Millions of common songbirds, such as the Cardinal, Blue Jay, and House Wren and long-distance migrants such as Indigo Bunting, Blue and Yellow Warbler.
Rare and endangered species, such as the Piping Plover, Florida Scrub-Jay, and California Least Tern
Birds that nest or feed on the ground, such as the California Quail
In 1997, American Bird Conservancy (ABC) launched the Cats Indoors!Campaign for Safer Birds and Cats to educate cat owners, policy makers, and the general public that cats, wildlife, and people all benefit when cats are kept indoors, confined to an enclosure when outdoors, or trained to go outside on a harness and leash.
ABC has produced a wealth of resources to inform the public about this issue. Materials include fact sheets, posters, the popular Cats, Birds, and You brochure, the Cats Indoors Educator’s Guide for Grades K-6, print and radio Public Service Announcements (PSAs), and more.