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Photo of the Day

February 14, 2008

Common Loons, Moose Lake, Wyoming, 1988

Photograph by Michael Quinton

Two common loons in checkered breeding plumage engage in a courtship ritual in Wyoming's Moose Lake. Loon pairs are generally monogamous and highly territorial, emitting their haunting yodels during the breeding season to ward off intruders and violently attacking any that come too close.

(Photo shot on assignment for, but not published in, "The Common Loon Cries for Help," April 1989, National Geographic magazine)