A bald eagle pauses to look at the camera while grooming itself Sunday in a tree near Thane Road. An eagle has as many as 7,000 feathers to groom. The bald eagle's scientific name is Hallaeetus leucocephalus, which means "sea eagle with a white head." When the eagle was named, "bald" meant "white" or "white-headed." Alaska has an estimated 45,000 to 50,000 bald eagles.