House Sparrow with beak deformity in Pennsylvania
By Alaska Science Center
February 2017 (approx.)
Detailed Description
House Sparrow with beak deformity characteristic of avian keratin disorder (AKD) shared by a citizen science observer in Jenkintown, Pennsylvania, USA. Avian keratin disorder 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.
Copyright: Photo taken by Bette Conover
Sources/Usage
Copyright Permission Agreement signed by Bette Conover. The U.S. Geological Survey has been granted permission to use copyright material in information products including publications, data releases, and webpages.
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Over the past 26 years, Alaskans have witnessed a startling increase of beak deformities among Black-capped Chickadees and other species of resident birds. This disease, called avian keratin disorder (AKD), is 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. If...
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Beak Deformities in Landbirds
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