Thayer's Gull (thayeri)(last update: January 22, 2013) |
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Thayer's Gull juvenile, November 24 2008, Nimbus Fish Hatchery, American River Parkway / Sacramento County, CA, US. Picture: Dave Jonson.Visit: Dave's Flickr photostream. Bird in complete juvenile plumage, primaries are the darkest part of the bird. |