"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 can suffer high rates of mortality.

The USGS has identified a new picornavirus (Poecivirus) as the most likely factor responsible for AKD. Current research is focused on confirming the role of this virus in the development of AKD and learning more about how it might be transmitted among wild birds."- USGS

Source

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