Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Slaty-backed Gull schistisagus adult, June 21 2013, Kamchatka/Chukotka Coast, Russia. Picture: Benjamin van Doren.

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Complete moult: P1/P3. Sub-terminal band on P5 and P10. Black on outerweb of P8, P9 and P10 reach to primary coverts. Note strong contrast between blackish outerweb of P10 and irs greyish innerweb. Broad white trailing edge to secondaries. Large 'moons', white tongue tips on P5-P8.