White-tailed eagle (Haliaeetus albicilla) are also known as sea eagle, erne (sometimes ern, ørn), gray sea eagle, and white-tailed sea-eagle — is a large bird of prey in the family Accipitridae which includes other raptors such as hawks, kites, and harriers. It is considered a close cousin of the bald eagle and occupies the same ecological niche, but in Eurasia. The genus name Haliaeetus is New Latin for "sea-eagle", from Ancient Greek hali-, "sea-" and aetos, "eagle". The specific albicilla, "white-tailed", is from New Latin albi-, "white" and cilla, "tail".