Saturday, April 13, 2019

Black-capped Chickadee

Seven races of Black-capped Chickadees are described from North America. Black-capped Chickadees in Olympia surprise me.  I assume they are the Pacific Coast race, Poecile atricapillus occidentalis. Their wings are at least a centimeter shorter than those of Minnesota birds. This difference may not seem very large, but it is obvious in a bird being banded. Olympia Black-capped Chickadees have far less white in the wing, and, overall, are duller and browner. They are far more different to my eye than Black-caps compared to Carolina Chickadees. I wonder what their genetics are like?

1 comment:

  1. Dan I really appreciate and enjoy these birds you are
    showing and writing per your new environs. Most all are new to me - sure hope I can go birding with you again in the Pacific
    Northwest. Thanks