CLOSED: Glaucous-winged Gull and Western Gull?

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cuihenggang Pittsburgh, PA Nov 08, 2014

Hi, here are two gulls I saw in Seattle last week. I guess the first one is a Glaucous-winged Gull and the second one is a Western Gull?

I have heard that Glaucous-winged Gulls and Western Gulls can interbreed. How will their offsprings look like?

Thanks,
Cui

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Post #9971500
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cuihenggang Pittsburgh, PA Nov 08, 2014

The photos are in the wrong order. The first one is Western Gull, the second one is Glaucous-winged Gull. Is that correct?

Cui

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Resin Northumberland, United Kingdom(Zone 9a) Nov 08, 2014

Yep, first is Western. But the second looks like an "Olympic Gull" - one of those hybrids (yes, they exist, and are common in the Seattle area). The primary tips are a little too dark for pure G-wG. The bill pattern shows it isn't a full adult, probably 3rd or 4th winter.

Resin

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cuihenggang Pittsburgh, PA Nov 09, 2014

Gulls are tricky...

Will gray back + dark primary tip = Herring Gull?

Thanks,
Cui

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Resin Northumberland, United Kingdom(Zone 9a) Nov 09, 2014

Quote from cuihenggang :
Will gray back + dark primary tip = Herring Gull?

Thanks,
Cui


Yep . . . and about 20 others, too ;-)

Resin

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