Eagles are members of the bird family Accipitridae, and belong to several genera which are not necessarily closely related to each other.Eagles differ from many other birds of prey mainly by their larger size, more powerful build, and heavier head and beak. Even the smallest eagles, like the Booted Eagle (which is comparable in size to a Common Buzzard or Red-tailed Hawk), have relatively longer and more evenly broad wings, and more direct, faster flight.