Thayer's Gull (Larus thayeri) - adult summer
Churchill, Manitoba, Canada - June 11, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Thayer's Gull (Larus thayeri) - adult summer, same bird as immediately above
Churchill, Manitoba, Canada - June 11, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Thayer's Gull (Larus thayeri) - adult summer, different bird from immediately above
Churchill, Manitoba, Canada - June 11, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Thayer's Gull (Larus thayeri) - adult summer, same bird as immediately above
Churchill, Manitoba, Canada - June 11, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Thayer's Gull (Larus thayeri) - adult summer, same bird as immediately above
Churchill, Manitoba, Canada - June 11, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA - February 13, 2004
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA - February 13, 2004
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - adult winter
Chicago, USA
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - 2nd winter
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - 1st winter
Belmont Harbor, Chicago, USA - February 27, 2004
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - juvenile
North Point Harbor, Chicago, USA - November 29, 2003
© Kanae Hirabayashi

Thayer's Gull (Larus thayeri) - juvenile
Lake Decatur; Macon County, IL, USA - October 17, 2003
Swarovski ST 80 HD (20 - 60X eyepiece), Nikon Coolpix 4500
© Travis A. Mahan