The town I live in is pretty well forested by urban standards. Also pretty well catted. There's no shortage of pigeons, blackbirds, crows, or sea gulls. Sitting at home I often hear doves and the occasional owl. Hummingbirds frequent the back yard and raptors are relatively common down town. Once I think I saw a really huge raven. So what's the problem? We also have wild flocks of parakeets and parrots. This is San Francisco, by the way.