A predator is a predator if it is a fox, raccoon or a cat it does not matter if it is hunting your livestock on your property then its a predator. I have cats, dogs, chickens. I saw that cat that carried off my little chick. If I did not live in town and had my gun that cat would be history. I have an outside cat that keeps stays and other cats off my property he was inside due to be black and it was Oct (Halloween). To the OP I am sorry you lost a bird but glad that the neighbor talked to you. I hope he keeps the cat locked up, which I know can be hard once they are used to going outside. Good luck and I hope you don't lose anymore birds.
I read this in some ones signature line.
The difference between a predator and a pet is what side of the fence it is on.