Thayer's Gull (thayeri)(last update: January 22, 2013) |
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Thayer's Gull adult, November 24 2013, Lake County, IL. Picture: Amar Ayyash.Limited winter streaking. Purple orbital ring, honey coloured iris with some speckling (25-50%), pale greenish-yellow base of bill and small red gonys spot. P9 fully grown, P10 growing. |