Coordinators:
John Cant
Mars Muusse
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Heermann's Gull heermannii PB3 moult (3CY), June 08 2015, Pacific Grove, California USA. Picture: John Cant.
P5-P10 old, without white tips (but may be worn away, though still tips look pretty good). Old coverts bleached brown rather than grey, and with heavily worn fringes.
Only small white tips on old secondaries indicate these feathers are 3rd generation. More blotchy speckling on head also indication of immaturity.
Later moult when compared to 3CY birds.
Complete moult just started, indicated by missing MC.
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Heermann's Gull heermannii