Thayer's Gull (thayeri)

(last update: January 22, 2013)

Amar Ayyash (USA)
Mars Muusse (Netherlands)

Thayer's Gull 1st cycle (2CY), February 05 2013, Davis Wastewater Treatment Plant, Yolo County, CA. Picture: Steve Hampton.

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Normally pigmented and pale individual. Note replaced scapulars and moult gaps indicating active moult in this region.