"More birds and mammals die at the mouths of cats... than from automobile strikes, pesticides and poisons..."

"... collisions with skyscrapers and windmills and other so-called anthropogenic causes." 

Domestic cats — pet and feral — "kill a median of 2.4 billion birds and 12.3 billion mammals a year" in the United States — "most of them native mammals like shrews, chipmunks and voles rather than introduced pests like the Norway rat."