Probably depends in part on the state/country you live in. But like Pamnangel said, it is, in general, illegal to keep eagles. They are protected under the Migratory Bird Treaty Act, which protects them from all forms of "take" (including possession). Eagles in North America are also protected by other local legislation (in California, Bald Eagles are still listed as endangered, though federally they have been delisted).
IF someone were to possess an eagle or part of an eagle, they would definitely need permits and licenses to allow it.