オオワシ
Steller's sea eagles hunt most commonly from a perch in a tree or rocky ledge located above the water, although they may also hunt on the wing, while circling above the water. Once located, prey is captured by diving. Eagles sometimes hunt by standing in or near shallow water on a sandbank, spit, or ice-flow, grabbing passing fish. It is reported that, compared with its white-tailed and bald eagle relatives, Steller's sea eagle is a more "aggressive, powerful, and active" raptor. Where feeding occurs in groups, kleptoparasitism is common. Kleptoparasitism is most beneficial in procuring food during periods of food abundance and in large feeding aggregations. Immatures use kleptoparasitism as much as adults, but are attacked more often by adults than birds of similar age. Adults appear to benefit most from this behavior. The bold color patterns of adults may be an important signal influencing the formation of feeding groups. However, a video from Russia shows a juvenile Steller's sea eagle aggressively displacing an adult from food during a protracted battle. Outside the breeding period, these eagles probably roost communally near their feeding sites. When salmon and trout are dying in winter after their summer spawning, feeding groups of Steller's sea eagles may mix with smaller golden eagles ("Aquila chrysaetos") and white-tailed eagles to exploit this food source. This area is the only one in the golden eagle's nearly circumpolar range where they are extensively dependent on fish for prey.