69-94 cm (27-37") Rare. From Asia. Casual to Alaska.
Very large dark raptor; huge yellow-orange bill.
In flight; shows large white shoulder patch on leading edge of wing and white thighs, white wedge-shaped tail.
Immature: lacks adult's white on leading edge of wing and its wedge-shaped tail is dark at end; white on underwings is blotchy like immature Bald Eagle's.
Videos
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Credit: Eugene Potapov
Images

Credit: Francesco Veronesi

Credit: Silvain de Munck