Thayer's Gull (thayeri)

(last update: January 22, 2013)
Coordinators:
Amar Ayyash (USA)
Mars Muusse (Netherlands)

thayers rings
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Thayer's Gull sub-adult, February 20 2010, Winthrop Harbor, IL. Picture: Erik Bruhnke.

Visit: Erik's Pbase photostream.

Note extensive black on bill, indicating immaturity. Note also black on outer web of P4 in left with and vestiges of black in tail.