Thayer's Gull (Larus thayeri), Island STP, Lake Havasu City, Mohave County

This Thayer's Gull was discovered by Chris McCreedy and photographed by David Vander Pluym on 21 November 2011

Casual in Az with less than 15 state records

Smaller than the average Herring Gull with largely brown plumage. Brown primaries with paler edgings. Small bill and rounded head. In flight it shows the pale underwing caused by the inner webs of the primaries being paler than the outer webs.

21 November 2011, photo by David Vander Pluym