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Erik Bruhnke | all galleries >> Gulls >> confusing gulls > Likely Kumlien's Gull (originally labeled as Thayer's Gull)
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Likely Kumliens Gull (originally labeled as Thayers Gull)
23-NOV-2009

Likely Kumlien's Gull (originally labeled as Thayer's Gull)

Wisconsin Point, Superior, WI

This bird looks like a juvenile Thayer's Gull with the slightly darker wing tips (to be expected), but the tertials on this bird don't look as solid and uniform to the outer edge, as the tertials appear on many juvenile Thayer's Gulls I've seen. The outer edge of the tertials on this bird almost have an Iceland Gull-like appearance. Note the bill size too... doesn't seem exceeding small for a Thayer's Gull bill, but would likely be towards the female-sized bill if this bird is a Thayer's Gull.

Canon EOS 40D
1/500s f/7.1 at 340.0mm iso800 full exif

other sizes: small medium large original
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Erik Bruhnke02-Dec-2010 04:08
Cool. Thanks for the feedback! We get Thayer's Gulls regularly (and from what I've observed, more commonly, than Iceland/Kumlien's Gulls here in Duluth).
Kirk Zufelt 02-Dec-2010 03:02
This looks well within the range of Kumlien's and well out of the range of Thayer's. I wouldn't even call this an intergrade. I don't think this is dark at all for Kumlien's Gull-heads a bit darker than average but not much.
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