Steller's Sea Eagles, Kamchatka, Russia

The large size (and Bergmann's Rule) suggests that it is a glacial relic, meaning that it evolved in a narrow subarctic zone of the northeasternmost Asian coasts, which shifted its latitude according to ice age cycles, and never occurred anywhere else. It is unique among all sea eagles in having a yellow bill even in juvenile birds, and possessing 14, not 12, rectrices. The skull and bill are the largest of any eagle and comparable to the largest Old World vultures, the biggest accipitrids.
The birds have been found in North America but this are considered to be individual eagles that have strayed from Asia, and they are not known to nest anywhere in North America. This species is classified as Vulnerable. The main threats to its survival are habitat alteration, industrial pollution and over-fishing. The current population is estimated at 5,000 and decreasing.