That bird certainly fits the notion of "Kumlien's Gull". We've had some birds like that here in Yolo Co. over the years as well. It's certainly not pure Thayer's, of course. Many now consider "Kumlien's" to be a hybrid swarm between pure Thayer's and pure glaucoides Iceland Gull (which means that virtually all "Iceland Gulls" in the US are hybrids). It also means that anything not pure Thayer's is "Kumlien's", somewhere on the cline between Thayer's and pure Iceland. For an illustration of these viewpoints, see my figures at
I believe the CBRC has only accepted two Iceland Gulls, and they appear to be pure glaucoides (the Otay bird at http://www.wfo-cbrc.org/cbrc/photos/icgu2.html;
and the adult bird from Bodega ). A photo of the latter and a discussion by the CBRC of kumliens and Iceland is in the 1999 report at http://www.wfo-cbrc.org/cbrc/98report/98report.pdf.
Very pretty bird, by the way!
Office of Spill Prevention and Response
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>>> Floyd Hayes <floyd_hayes@...> 2/20/2006 11:42 AM >>>
Photos taken this weekend of a gull resembling a
1st-basic Kumlien's Iceland Gull at Clearlake Park,
Lake County, are posted at:
The site limits the number of hits per hour, so if it
shuts down, wait an hour and try again. Comments on
the bird's identity are welcome.
The gull was seen by several individuals over the
weekend (and videotaped by Les and Cindy Lieurance, I
just learned), but was not seen for a month despite
numerous searches since it was first found on 16
January (see link in above websites to original
photos), so relocating it may be very difficult (the
movements of gulls on the lake are hard to predict).
Directions to this and other Lake County rarities have
been posted to Mendobirds.
Hidden Valley Lake, Lake County
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