Great Black-backed Gull
Larus marinus

First cycle bird, South Beach, Marquette, Michigan, 31 March 2013; flight shot, with good comparison with adjacent Herring Gull.

First cycle bird, mouth of the Dead River, Marquette, Michigan, 12 November 2010.

First cycle bird, mouth of the Dead River, Marquette, Michigan, 19 November 2011.

First cycle bird, (lower left), on the ice in large flock of Herring Gulls, Picnic Rock, Marquette, Michigan, 3 March 2013.

Third cycle bird, South Beach, Marquette, Michigan, 6 April 2013.

Third cycle bird, from the deck of a ship, Holyhead, Wales, 31 December 2007.

Adult bird, Lower Harbor, Marquette, Michigan, 23 November 2011; here, is a shot of the same bird with a first cycle Thayer’s Gull (and Herring Gulls.

Adult bird, motel rooftop, southeast corner of S. McClelland and US 41, Marquette, Michigan, 30 November 2011.

Here is a shot of 8–10 Great Black-backed Gulls, part of a group that totaled 18 (which is, I believe, a U.P. high count for this species), mouth of the Dead River, Marquette, Michigan, 2 January 2012.

Here is a shot of three Great Black-backed gulls, part of a group of five, in a squall, at the mouth of the Dead River, Marquette, Michigan, 23 November 2012.