USGS biologists conduct research on avian keratin disorder in wild bird populations in Alaska. Video courtesy of Rachel M. Richardson. March 2012
Watch a Hairy Woodpecker with a grossly overgrown beak trying to feed on peanut butter at a feeder during winter in Anchorage, Alaska. Video courtesy of Peter Johnson. January, 2015.
Black-capped Chickadee with a grossly overgrown beak. Video courtesy of Lee Tibbitts. January, 2007