Real Dictionary

bald eagle
countable noun: A bald eagle is a large eagle with a white head that lives in North America. It is the national bird of the United States of America.

bald eagle in American English
a large, strong eagle (Haliaeetus leucocephalus) of North America: the adult has a white-feathered head and neck and a white tail: the national bird of the U.S.
noun: a large, fish-eating eagle, Haliaeetus leucocephalus, of the U.S. and Canada, having dark golden-brown back and wings, and white plumage on the head and tail in the adult: some recently endangered populations are now recovering

bald eagle in British English
noun: a large eagle, Haliaeetus leucocephalus, of North America, having a white head and tail, a yellow bill, and dark wings and body. It is the US national bird