27 November 2015

Juvenile Thayer's & Kumlien's - Northern Illinois

Thanksgiving Day, 26 November 2015; Lake County, Illinois.

A somewhat pronounced gonys angle, coupled with a few renewed upper scaps and an apparent short wing projection gives this Thayer's a somewhat "Cook Inlet" look. Photo 1 of 5.

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Juvenile Kumlien's Gull.
Juvenile Lesser Black-backed Gull.

Adult Lesser Black-backed with tongue pierced through the lower mandible.

This bird was yawning frequently in the 3-4 minutes I observed it. I got the impression it was mildly agitated.