"Kumlien's Gull"
Iceland x Thayer's
hybrid
Photo by Mike Rogers, copyright 1999.
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second winter "Kumlien's Gull" Iceland x Thayer's hybrid Photo by Mike Rogers, copyright 1999. |
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| Fig 1) This could be a pure Thayer's, but compare the darkness of the outer primaries with a more obvious second winter Thayer's Gull . On this bird, the primaries are the same shade of brown as the markings on the wing coverts. SF Bay Area, CA. February 24, 1998. |