After three years they become sexually mature and establish breeding territories of their own. They build nests on trees and on rocks but can also use abondened nests of birds of prey. Nests can be used for a number of years. May. Ravens are omnivorus. They prey on small mammals but also on insects, young birds, amphibians and others.
Ravens are highly specialized on finding carcasses.
Often already a few hours after a kill of wolves, they arrive at the dead animal. Raven at a wolves kill collecting meat, Poland. In middle Europe we know about ravens visiting open rubbish dumps, animals killed by cars or deadborn livestock. The nominate form Corvus corax includes 5-8 subspecies. The genus Corvus contains three further species.