Falco leucocephalus, Ch. Bonaparte, Synops. of Birds of the United States, p. 26.
Nuttall, Manual, part i. p. 72.
AauiLA LEUcocEPHALA, Swuins. and Richards. Fauna Boreali-Americana, part ii. p. 15.
Sea Eagle, Falco ossifragus, WUs. Amer. Ornith. vol. vii. p. 16. pi. 55. fig. 2.
The Young Bird fully fledged is represented in Plate CXXVI.
In this state it differs greatly in its colours from the F. ossifragus or young of the F. albicilla of Europe, with which it was confounded by Wilson.
The bill is black above, bluish-grey towards the end of the lower mandiblej the cere, the base of the lower mandible, and the soft margins of the bill at the angle, yellow tinged with green. The narrow elongated feathers of the head and neck are dark-brown tipped with dull white, and the general colour of the plumage above is dull hair-brown ; the lower parts having the feathers deep brown, broadly margined with greyish-white. The quiUs are deep brown, and the tail-feathers are brownish white, minutely mottled with dark brown, and having their extremities of that colour. The iris is yeUowish-brown, the feet greenish-yellow, the claws black.
The Adult birds have been described in vol. i. of the present work, p. 169.
