The issue with just citing bird kill counts is that not all birds are equally endangered or of equal conservatory value. The birds people are worried about are

The issue with just citing bird kill counts is that not all birds are equally endangered or of equal conservatory value. The birds people are worried about are predominately large birds like raptors. House cats kill lots of sparrows, but they're not killing California Condors for example. A more useful analysis would need to focus on impacts of different sources specifically on endangered birds.