[obol] Re: Thayer's vs Glaucous-Winged x Western?
- From: David Irons <llsdirons@xxxxxxx>
- To: Tim Janzen <tjanzen@xxxxxxxxxxx>, OBOL Oregon Birders Online <obol@xxxxxxxxxxxxx>
- Date: Sun, 1 Feb 2015 06:33:05 +0000
Justin,
I agree with Tim Janzen on this bird. Definitely not a Thayer's. Bill is too
thick and in my opinion a bit too richly colored for a mid-winter Thayer's,
which tends to have a very washed out bill this time of year. Further, winter
adult Thayer's typically have a bit of a dark smudge around the eye, which this
bird also lacks.
The fairly clean white head, essentially black primary tips and fairly colorful
bill with no apparent black on the gonys point to this being a Glaucous-winged
Gull X Western Gull hybrid that is closer to the Western Gull end of the hybrid
cline. More midling hybrids and closer to pure adult Glaucous-winged Gulls
typically show a bit of black near the top of the red gonydeal spot.
Dave Irons
Portland, OR
From: tjanzen@xxxxxxxxxxx
To: obol@xxxxxxxxxxxxx
Subject: [obol] Re: Thayer's vs Glaucous-Winged x Western?
Date: Sat, 31 Jan 2015 21:46:44 -0800
Dear Justin,The bill seems a little bit thick for a Thayer's Gull and the head
seems somewhat larger and less rounded than I typically see on a Thayer's Gull.
I am more inclined to go with Glaucous-winged/Western hybrid. Did you get any
open wing shots?Sincerely,Tim Janzen From: obol-bounce@xxxxxxxxxxxxx
[mailto:obol-bounce@xxxxxxxxxxxxx] On Behalf Of Justin Cook
Sent: Saturday, January 31, 2015 9:32 PM
To: obol@xxxxxxxxxxxxx
Subject: [obol] Thayer's vs Glaucous-Winged x Western? Hello,Thought I'd get
some opinions on this gull I saw at Clackamette Park today. I thought "oh a
Thayer's" but then Larus-doubt creeped in and took hold.
https://flic.kr/p/q4zU6m
https://flic.kr/p/qJasZgSo it has a "friendly" face, I'd let it take a Mew to
the prom. Somewhat slenderish bill but the gonydeal seems to have some angle
to it. The eye was fairly dark with maybe a raspberry coloring to the orbital
but the light could have been better.The legs don't have that deep pink color.
The gray mantle was a close match to the Glaucous-Winged gulls.I saw a picture
on the interweb that seemed close and it was a Glaucous-Winged x Western but
the mantle was darker. Thanks in advance for any help!Justin
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