As one who has been quite skeptical about most Oregon reports of Plumbeous
Vireo, I have to say that the photos and sound recordings of this bird point to
it being the genuine article. I sent photos to veteran bander Tony Leukering,
who has spent much of his birding life in Colorado. Tony aged this bird as
after-hatch-year, based on the clear signs of prebasic molt (tail feathers
growing in). He said he had no issues with calling it a Plumbeous. Most of the
head and body feathers appear to be fresh and newly replaced and yet the
excellent photos of this bird show virtually no green or yellow in the plumage.
There is a slight tinge of yellow along the lower flanks, which is fine for
Plumbeous. The crisp contrast between the gray hood and white throat also
supports Plumbeous, which to my eye often look like a black and white version
of Blue-headed Vireo.
In addition to the photos taken by Callie Gesmundo and Rick Vetter, there are
also good sound recordings. While sorting the vocalizations of Cassin's and
Plumbeous isn't always possible (some overlap according to Ed Pandolfino), when
I listened to the recordings the bird did not sound like a typical Cassin's to
me. The tonal pitch was lower and a bit throatier.
Congratulations to Callie for her great find and documentation of this bird.
Dave Irons
________________________________
From: obol-bounce@xxxxxxxxxxxxx <obol-bounce@xxxxxxxxxxxxx> on behalf of Russ
Namitz <namitzr@xxxxxxxxxxx>
Sent: Saturday, August 5, 2017 5:55 PM
To: OBOL Freelist
Subject: [obol] Harney Plumbeous Vireo
Callie Gesmundo came up with another great find at Page Springs, a PLUMBEOUS
VIREO. Check eBird for details, photos and sound recordings. She emailed today
and said the bird is still present for the 3rd day in a row.
Russ Namitz
Oregon
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