37-B-2016 Glaucous Gull
It was chilly and overcast outside with a strong wind.
The bird was 75 meters away from me.
Large gull (appears about 2x the size of Ring-billed Gulls nearby)
Large pink bill with black tip.
Paler pink legs.Very pale tan-white uniform appearance, including primaries, with brownish tinge to outer edges of wing and undertail coverts.
Age: Juvenile (determined by uniform paleness (lack of pale blue-gray back) and long pink bill with black tip.
It was on a shallow spot in the river with about 15 Ring-billed Gulls.
The large size, large and mostly pink bill, and extreme paleness readily ruled out Thayer's Gull and Iceland Gull (including the pale Kumlien's form of Iceland Gull). Neither species is as large or as pale overall in at any age or plumage. And neither have a large, mostly pink bill combined with that uniform paleness of Glaucous Gull.
Glaucous-winged Gull was ruled out by the same standards. At the same age as the bird observed, Glaucous-winged Gull is consistently a dark brown overall and the bill is very consistently all black. The primaries are also the same color as the mantle of the bird. On the other hand juvenile Glaucous Gull wingtips are all white (and at all ages), contrasting with the mantle.
Also juvenile Glaucous Gull's very pale appearance and the lone, dark eye give it a distinctive small-eyed appearance.
FIRST ROUND VOTING:
Excellent photos show a 1W Glaucous Gull.
Excellent photos and description eliminating similar gulls is covincing
Good description and similar species discussion with diagnostic photos make this an easy one.
The photos and description were convincing.
well described and diagnostic pics
Looks like a typical Glaucous Gull
Photo clearly shows a Glaucous Gull, also a nice report from Austin!