The Common Raven is a medium-to large-sized bird that is covered in completely black feathers. The Common Raven is often mistaken for the American crow. They are distinguishable from crows by their larger size, heavy bill, grizzled looking feathers and rounded tail. These birds are members of the corvid family that includes the American Crow, Magpies, and Jays. The corvid family's distinguishing factor is incredibly high intelligence.