delawarensis Ring-billed Gull

(last update: 10-03-2014 )

Keith Mueller
Amar Ayyash
Mars Muusse

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Ring-billed Gull delawarensis 2nd PB moult (2CY), July 23 2009, Willoughby Lake, Westmore, Vermont. Picture: Jay.

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Outer juvenile primaries P8-P10 very worn, 1st PB moult halfway, with P1-P5 new, P6 growing. Outermost secondaries now dropped as well, and also central rectrices missing. Dark iris.