Black-capped Chickadee

Image: Black-capped Chickadee

Detailed Description

This Black-capped Chickadee, captured in Anchorage, Alaska, demonstrates an overgrown beak characteristic of avian keratin disorder.  Beak deformities in this species were first observed in the late 1990s and biologists have since documented more than 2,100 affected individuals in Alaska.

USGS Alaska Science Center

Details

Image Dimensions: 525 x 525

Location Taken: US