Believe it or not, subspecies-level taxonomy of North American birds hasn’t been updated by the American Ornithological Society since the 1950s. In this article, avian molt and taxonomy expert Peter Pyle takes a deep dive into the subject and offers his suggested revisions.
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Peter Pyle, Staff Biologist with The Institute for Bird Populations, is an expert on molt and author of the two-volume Identification Guide to North American Birds. Also an expert on the birds of Hawaii, he puts his knowledge to use as Chair of the ABA Checklist Committee.
