As prey, young crows and unhatched crow eggs are eaten by raccoons, opossums and tree-climbing snakes. Hawks and owls kill fledgling and adult crows. Crows are especially vulnerable to night attacks by great horned owl. They also mob hawks. In turn, crows are mobbed by smaller birds, especially kingbirds and red-wing blackbirds.
Crows are curious.
Shiny objects fascinate them, and they have been known to fly off with bits of glass, rings, keys, etc. Crows exhibit their intelligence by imitating a large number of sounds, including whistles, cats, machines and the human voice. Population Crows not only live alongside man, they've survived in spite of him. Because of their habits of pulling up corn shoots and occasionally robbing game bird nests, crows have been persecuted. Some estimates put the crow population at more than three billion in North America.