White-winged Dark-eyed Junco (Junco hyemalis aikeni), Hearst Tanks, Grand Canyon South Rim, Coconino County
This White-winged Dark-eyed Junco was
discovered and photographed by Brian Gatlin on 13 December 2012.
White-winged Dark-eyed Junco is a casual winter visitor
and has only been recorded in three previous winters.
Four were found in the winter of 2000-2001, one in 1971
and several in the winter of 1936-37.
"Distinguishing White-winged Junco from Slate-colored
Junco is the only challenge here. [A small percentage of
Slate-colored Juncos have wing bars.]
According to Beadle and Rising (1996, pp 224-9), for
Slate-colored Junco, the 2 outer rectrices (5th and 6th)
are white, with some white showing on the 4th (this
white on the 4th is on the inner portion, with dark on
the outer web). On White-winged, the 4th, 5th, and 6th
rectrices are white, with some white showing on the 3rd.
In one picture you can see the three outer rectrices
edge on, and all appear white (including on the outer
web, where one would expect dark on the 4th rectrice of
a Slate-colored). I had some concern that the bird was
too dark, but I received the following comments from
Christian Nunes (who sees WWJU regularly and has looked
closely at many juncos): "This certainly is a
White-winged Junco. One feature that stands out on WWJUs
in CO is the large, dull bill with an almost silvery
hue. This bird shows this aspect well. The color of the
bird and the contrast of the lores also look typical of
WWJUs in CO."
13 December 2012, photo by Brian GatlinAll photos are copyrighted© by photographer
Submitted on 05 February 2013