Cats and Wildlife: A Conservation Dilemma. A well researched academic article by John S. Coleman, Stanley A. Temple and Scott R. Craven about the threats posed to wildlife by cats.
The Dangers Posed By Cats. An article from Bird Watchers Digest summarizing research about the impact of cats on birds and legislative attempts to control it
Cat Facts. Summary of statistical evidence and suggested responses.
Protecting Wildlife from Domestic Cats. Fact and tip sheet from Susan R. Sandstrom of the U.S. Fish and Wildlife Service. Includes suggestions for helping outdoor cats make the transition to being indoor cats.
Cats & Wildlife. Another helpful FAQ, this one from PAWS: the Progressive Animal Welfare Society.
Lindsay Wildlife Museum and Wildlife Hospital. One of the biggest wildlife rehabilitation programs offers some convincing statistics on the damage cats do to their patients, as well as plenty of good reasons for keeping cats indoors.
Tabbies Take Toll on Wildlife. Another accounting of feline feasting on wildlife provided as a public service by the Geophysical Institute at the University of Alaska, Fairbanks.
The Great Australian Cat Dilemma. Feral, stray and pet cats are destroying native wildlife species in Australia. Eradication of cats has been suggested.
Free-running Cats Kill Birds. Repost of a Reuters story announcing a joint program of the American Bird Conservancy and the Humane Society of the United States to encourage cat owners to keep their pets indoors.