delawarensis Ring-billed Gull

(last update: 10-03-2014 )

Keith Mueller
Amar Ayyash
Mars Muusse

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1cy June
1cy July
1cy Aug
1cy Sept
1cy Oct
1cy Nov
1cy Dec

2cy Jan
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2cy March
2cy April
2cy May
2cy June
2cy July
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2cy Dec

3cy Jan
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adult June
adult July
adult Aug
adult Sept
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adult Nov
adult Dec

Ring-billed Gull delawarensis 70A adult, September 12 2015, Sandy Point State Reservation, Ipswich, Essex County, Massachusetts. Picture: Steve Arena.

Please visit Steve's Flick photostream excellent website for many more images! Blue 70A was banded as an adult in winter (hence no provenance on origin or exact age), on November 20 2013 at Vandenburg Esplanade Park, Middlesex County, Massachusetts USA.

Last stage of the complete moult: no old primaries left, P7 fully grown.