[Tweeters] King County Slaty-backed Gull

Andrew McCormick andy_mcc at hotmail.com
Tue Dec 5 13:10:08 PST 2017


I apologize for not putting this on Tweeters sooner, but we've had some debate about this bird, and I was hoping for agreement from another person who saw it on Saturday. The essence of the debate is that it might be a Glaucous-winged x Western gull hybrid. However, the mantle and wings are very dark, the eye is pale yellow, the feet are pinkish red. The bill is mostly parallel with a small angle at the gonys. We could not see if there is an eye ring. The Slaty-backed is said to have a red eye ring. I still think it is a Slaty-backed Gull, but my experience with this species is limited to one observation of a flying gull identified by another person. I've read a lot about this species in the past two days. I posted photos, which I took on Sunday, on my eBird checklist and wanted to see if it would pass muster there before posting it on Tweeters. On Saturday and Sunday the bird was alone at the northern end of the seawall north of Salty's Restaurant. It moves from standing on logs to perching on a nearby building, to sitting on the water. It did not fly very much at all. It was separated from a large flock of gulls which congregate on buildings and along the boardwalk south of Salty's Restaurant. I have not returned to Redondo since Sunday. Any observations would be great.


Andy McCormick

Bellevue, WA

From: Ian Paulsen <birdbooker at zipcon.net>
Sent: Monday, December 4, 2017 4:58 PM
To: tweeters at u.washington.edu
Subject: [Tweeters] King County Slaty-backed Gull

Saw this posted on eBird:

Slaty-backed Gull (Larus schistisagus) (1)
- Reported Dec 03, 2017 13:00 by Andrew McCormick
- Redondo Pier, King, Washington
- Map: http://maps.google.com/?ie=UTF8&t=p&z=13&q=47.3484625,-122.3=
- Checklist: http://ebird.org/ebird/view/checklist/S40902453
- Media: 4 Photos
- Comments: "Large gull uniformly slate gray color across mantle to wing
tips. Head white with gray streaking. Bill fairly straight with only a
shallow angle at the gongs. Feet reddish pink. First seen on Saturday,
Dec. 2 as part of Seattle Audubon Puget Sound Seabird Survey. Unable to
see eye or feet yesterday. Returned today and able to photograph the bird.
Confirmation of identification requested."


Ian Paulsen
Bainbridge Island, WA, USA
Visit my BIRDBOOKER REPORT blog here:

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