Blue-winged Warbler (Vermivora pinus), Cook's Lake, private property, Pinal County
This Blue-winged Warbler was discovered on an AZFO
mini-expedition led by Troy Corman to Cook's Lake along the San Pedro River
south of Dudleyville on 25 October 2009. This area is private property and
not open to the public. It was photographed by Andrew Core at the same
There are only eight previous records of this species for Arizona.
Blue-winged Warbler and Golden-winged Warbler form a pair of closely related
species that hybridize and compete with each other. Historically
Golden-winged has been the more westerly and northerly of the pair. Not
surprisingly there are many more records of Golden-winged Warbler in Arizona
than of Blue-winged. However, Blue-winged has been aggressively
expanding westward and northward into the Golden-winged Warbler's traditional range and is
displacing it. It will be interesting to see if this results in an
increase in Blue-winged Warbler records in Arizona. This is the second in
Arizona in two years. In California, there was only one record in the
1950's and the next occurred in the 1980's, after which it became nearly annual.
A similar pattern appears in the Arizona records - one record in the 1950's and
all the rest since 1982.
Note the yellow head and underparts, white undertail coverts, dark eyeline, narrow white wingbars,
and grayish-blue wings.
25 October 2009, photo by Andrew CoreAll photos are copyrighted© by photographer
Submitted on 26 October 2009