P.O. Box 98199
Washington, DC 20090-8199
Inspiring people to care about the planet since 1888
Learn More »
← Back to Mating Season on Todagin Mountain
Two young male Stone’s sheep, Ovis dalli stonei, practice head butting contests that play an important role in establishing the hierarchy among males. Photo by Paul Colangelo.
© 1996-2012 National Geographic Society. All rights reserved.