Adult American Herring Gulls, Lake Michigan region – 201402

A selection of images showing adult American Herring Gulls Larus smithsonianus, as seen in the soutern Lake Michigan region, USA, in February 2014.

At first glance they don’t look that much different from a European Herring Gull Larus argentatus argenteus, but have a look at this in-depth description of their features: Adult American Herring Gulls, seen from a Dutch perspective.

14 February 2014, Lake County Fairground, Libertyville, Illinois, USA.

14 February 2014, Lake County Fairground, Libertyville, Illinois, USA.

14 February 2014, Lake County Fairground, Libertyville, Illinois, USA.

14 February 2014, Lake County Fairground, Libertyville, Illinois, USA.

Lake County Fairground, Libertyville, Illinois, USA. 14 February 2014.

Lake County Fairground, Libertyville, Illinois, USA. 14 February 2014.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA. With black mark on the outer web of P4.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA. With black marks on both webs of P4.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA. Another individual with black marks on both webs of P4 and a small mirror on P9 in the left wing only.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA.

15 February 2014, North Point Marina, Winthrop Harbor, Illinois, USA. Individual with a small mirror on the inner web of P9 only.

16 February 2014, BP Whiting refinery, Indiana, USA.

16 February 2014, BP Whiting refinery, Indiana, USA. Individual with small mirror on the inner web of P9 and a black mark on the outer web of P4.

16 February 2014, BP Whiting refinery, Indiana, USA.

16 February 2014, BP Whiting refinery, Indiana, USA. Individual with a small mirror on the inner web of P9 only.

16 February 2014, BP Whiting refinery, Indiana, USA.

16 February 2014, BP Whiting refinery, Indiana, USA. Individual with a wedge-shaped mark on the outer web of P4.

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