aaannnddd Owls! yep, got to watch out for them hooters. They wake up in the evening, sometimes while there is still daylight. (had one land in our yard a while back during the afternoon. He/she was very pretty to look out with them big ol' saucer eyes. It was hunting early during time when they have nests. We have a pair living diagnally behind us. They boom instead of hoot. Big ol' owls.
Also, skunks and on rare occasions a cougar. Believe it or not it has happened. It is amazing how wild life has adapted to urbanization.
The worst predator is the neighborhood dogs. The only predator we don't have is bears.
Oh and snakes. Can't forget the snakes as they will take eggs and a chick or 2 depending on the size of the snake.