This animal papercraft is designed by Yamaha papercraft. The Steller's Sea Eagle, Haliaeetus pelagicus, is a large bird of prey in the family Accipitridae. It lives in coastal northeastern Asia and mainly preys on fish. On average, it is the heaviest eagle in the world, at about 5 to 9 kilograms (11 to 20 lb; 0.79 to 1.4 st), but often lags behind the Harpy Eagle and Philippine Eagle in some other measurements. This bird is named after the German naturalist Georg Wilhelm Steller.
Steller's Sea-eagle is the biggest bird in the genus Haliaeetus and is one of the largest raptors overall. The typical size range is 85 to 105 cm (33 to 41 in) long and the wingspan is 1.95 to 2.5 m (6.4 to 8.2 ft). Females typically weigh from 6.8 to 9 kilograms (15 to 20 lb; 1.07 to 1.4 st), while males are rather lighter with a weight range from 4.9 to 6 kilograms (11 to 13 lb; 0.77 to 0.94 st). An unverified record exists of a huge female, who apparently gorged on salmon, having weighed 12.7 kilograms (28 lb; 2.00 st).
Two subspecies have been named: The relatively widespread nominate pelagicus and the virtually unknown H. p. niger. The latter name was given to the population which lacked white feathers except for the tail and supposedly was resident all year in Korea. Last seen in 1968 and long believed to be extinct, a female matching H. p. niger in appearance was born in captivity in 2001. Both its parent were "normal" in appearance, indicating that H. p. niger is an extremely rare morph rather than a valid subspecies, as had already been suggested earlier.
The relationships of Steller's Sea-eagle are not completely resolved. mtDNA cytochrome b sequence data tentatively suggests that this species's ancestors diverged early in the colonization of the Holarctic by sea eagles. This is strongly supported by morphological traits such as the yellow eyes, beak, and talons shared by this species and the other northern sea-eagles, the White-tailed and Bald Eagles, and biogeography. It is unique among all sea eagles in having a yellow bill even in juvenile birds, and possessing 14, not 12, rectrices. The skull (at about 14.6 cm (5.7 in)) and bill are the largest of any eagle and comparable in size to the largest Old World vultures, the biggest accipitrids.
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