They scavenge for food in garbage dumps and along roadsides where animals have been killed by cars. Crows eat the eggs and young of other birds and this makes them very unpopular with bird watchers. They also eat seeds, berries and especially corn. Some studies have shown that nearly two-thirds of their diet in the summer are insects like beetles, grubs, bees, grasshoppers, termites, and ants. This means they control insects that harm farmers' crops.
Crows also feed on toads, frogs, snakes and small mammals.
The undigested material that is regurgitated is called a pellet. By examining pellets of different birds like owls, hawks, crows and eagles, scientists can discover the sources of food used by these birds. The crows are adaptable and resourceful birds and can live in a wide variety of habitats. They prefer open areas like fields for hunting and wooded areas for nesting and roosting. Their population has increased as more open areas are created by cutting forests.