The Postal Service issued a 17-cent definitive Bighorn Sheep stamp on May 21, 2007, in Washington, DC. Carl T. Herrman of Carlsbad, California, designed the stamps.
The stamp features a stylized drawing of a bighorn sheep (Ovis Canadensis). This kind of sheep is found from southwestern Canada to northern Mexico. Its range includes the colder, higher elevations of the Rocky Mountains and some of the hottest, most arid regions of the American Southwest and Mexico. To create the image on the stamp, artist Nancy Stahl of New York, New York, worked from photographs of bighorn sheep.
Postal Bulletin (April 26, 2007).