delawarensis Ring-billed Gull

(last update: 10-03-2014 )

Keith Mueller
Amar Ayyash
Mars Muusse

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Ring-billed Gull delawarensis BLUE TAG adult, November 12 2011, Monroe Harbor. Chicago, IL. Picture: Amar Ayyash.

See Amar's blog.

The tag on the right wing was missing. This individual could have been a hatch-year bird when it was tagged or an adult. The swollen left tibia and notably short legs make for a somewhat abnormal looking Ring-billed.

below: delawarensis 0604-99926 adult, November 02 2010, Montrose Beach, IL. Picture: Amar Ayyash.

This individual had its eggs oiled at the Dime Pier colony (directly south of Navy Pier).