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Northwestern Crow with deformed top beak in Auke Bay, Juneau, Alaska

By Alaska Science Center
Large black bird with a longer beak than normal in a tree
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Detailed Description

Northwestern Crow with deformed top beak in Auke Bay, Juneau, Alaska. Avian keratin disorder (AKD) is a disease characterized by debilitating beak overgrowth and other abnormalities of keratinized tissues. Affected birds have difficulty feeding and preening and may suffer high rates of mortality.

Sources/Usage

Public Domain.

U.S. Geological Survey