American Crow is one of the most intelligent birds. This large all-black bird is aggressive and has a hoarse and cawing voice. It can be seen on treetops, fields, and roadsides. It thrives around people. It feeds on the ground and eats almost anything – typically earthworms, insects, other small animals, seeds, and fruits. It also eats garbage, carrion, and chicks that it robs from nests.