I have read of people complaining about feral cats in their yards, killing birds. Well, I have feral cats in my neighborhood and I have never found a dead bird, even though I feed birds.
But a did see a large grackle pecking at something on the ground, which I took to be a piece of fluttery paper. When I checked, I found a sparrow, its eye pecked out and a small wound in its back. As I write this, it is now dying quietly.
I know sparrows are a dime a dozen, but they are still noticed by God (Matthew 10:29).
So don’t assume it is a cat.