Pacific Loon (Gavia pacifica) - immature
Bodega Bay, California, USA - September 17, 2008
Canon EOS 40D, Canon 500mm f/4.0 L USM
© Martin Lofgren

Pacific Loon (Gavia pacifica) - adult molting
Note green tint on throat of this bird
Moss Landing, California, USA - September 11, 2008
Canon EOS 40D, Canon 500mm f/4.0 L USM
© Martin Lofgren

Pacific Loon (Gavia pacifica) - adult breeding
Twin Lakes, Churchill, Manitoba, Canada - June 12, 2006
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren