Bonaparte's Gull (Chroicocephalus philadelphia) - Ad summer
Churchill, Manitoba, Canada - June 14, 2007
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Bonaparte's Gull (Chroicocephalus philadelphia) - Ad winter
Point Lookout, Long Island, NY, USA - Jan 9, 2005
Canon D20, Canon 400mm 5.6 L
© Martin Lofgren

Bonaparte's Gull (Chroicocephalus philadelphia) - 1st winter
Mazatlan, Mexico
© Jon Hornbuckle

Bonaparte's Gull (Chroicocephalus philadelphia) - 1st winter
Mazatlan, Mexico
© Jon Hornbuckle

Bonaparte's Gull (Chroicocephalus philadelphia) - Ad winter, and First Winter
Queens NY, USA
Nikon FE, 400mm Tokina