Northwestern Crow with deformed top beak in Auke Bay, Juneau, Alaska
![Large black bird with a longer beak than normal in a tree](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Auke_Bay_NOCR_4-11-09.jpg?itok=u4QzQsk5)
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