American Herring Gull (smithsonianus)

(last update: October 30, 2015)
Coordinators:
Amar Ayyash (US)
Bruce Mactavish (Canada)
Dave Brown (Canada)
Mars Muusse (Netherlands)

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American Herring Gull (smithsonianus) 3rd cycle (3CY), October 12 2015, Lake County, Illinois. Picture: Amar Ayyash.

Sub-adult bird, probably in 3rd cycle. Bold white tips on outer primaries, in combination with immature pattern on tertials and coverts. Large black patches in tail.