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California Gull ID

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Saw this individual in Half Moon Bay, California. I think this is an Iceland Gull, though I am stuck on the subspecies. The coloration suggests an immature Kumlien's, though the primaries and tertials are darker than that of Kumlien's.

Thank you for your help.


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47 minutes ago, Trevor L. said:

Photo Sleuth is saying it’s most likely Iceland. Not sure how to narrow it down further.

Now that Thayer’s Gull is a subspecies of Iceland Gull, rather than a separate species, it makes sense. Immature gulls are so tricky! 

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