documenting AKD (was: "Re: [cobirds] Another bird with a deformed...")

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Ted Floyd

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Feb 18, 2021, 3:19:16 PM2/18/21

to Colorado Birds

Thanks to Thomas Heinrich and David Leatherman and Gary Bower and others for their observations of birds showing AKD (avian keratin disorder).

Those are particularly dramatic cases, but, unfortunately, low-level expression is all over the place in Colorado--and indeed around the entire northern hemisphere.

Here are two ravens (downtown Boulder, Boulder County, Feb. 16, 2021) with mild expression:

It's really valuable to photo-document such birds--and to post photos at well-curated sites like the Macaulay Library (eBird) and iNaturalist.

Ted Floyd