Thayer's Gull (thayeri)(last update: January 22, 2013) |
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Thayer's Gull adult, September 10 2012, Teslin Lake, Yukon. Picture: Yukon Bird Observatories.Visit: Yukon Bird Observatories. Bird in complete moult: P6 fully grown, P8-P10 old. With adult Herring Gull (left). |