Coordinators:
Keith Mueller
Amar Ayyash
Mars Muusse
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adult Jan
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Ring-billed Gull delawarensis xxxx-xxx62 adult, July 31 2013, Chicago, IL. Picture: Amar Ayyash.
Band Number incomplete. Bird in complete moult: P8-P10 still old. Missing central greater coverts expose the secondary centres underneath.
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delawarensis Ring-billed Gull