For example, they often feed in flocks, with one or two crows posted as lookouts. This enables the whole flock to escape unharmed. This allows them to keep in touch with the entire flock while hunting, for example. The flock won't necessarily be able to see each other, but they can hear the caws. In this manner, each crow can tell the others about the food or predators it finds.
Crows are also very mischievous.
Mating Some crows mate for life. Although they are not able to mate until their second year, they pair off at the end of their first, and remain with their mate for life. Both males and females build nests. Crows typically lay between four and six eggs, which are incubated by both parents. By four weeks, the new crow has most of its feathers.