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![National Park Service: U.S. Department of the Interior](https://webarchive.library.unt.edu/eot2008/20090509085628im_/http://www.nps.gov/imr/templates/images/graphics/prntarrw.gif) ![National Park Service Arrowhead](https://webarchive.library.unt.edu/eot2008/20090509085628im_/http://www.nps.gov/imr/templates/images/graphics/prnttitl.gif) |
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Colorado National Monument
Desert Bighorn
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![Desert Bighorn in Monument Canyon Desert Bighorn in Monument Canyon](https://webarchive.library.unt.edu/eot2008/20090509085628im_/http://www.nps.gov/colm/naturescience/images/wa892f28.jpg) |
(Photo by Walt Fite) | Desert Bighorn |
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Desert bighorn sheep are among the most intriguing mammals of canyon country. They are wary of human contact and blend so well into the terrain they inhabit that sightings are a special event. Once in danger of becoming extinct, the desert bighorn are making a tentative comeback in southeast Utah due to a comprehensive reintroduction effort by the National Park Service. With one of the few remaining native herds, Colorado National Monument has been a critical area for restoration efforts.
Desert or Nelson’s bighorn sheep (ovis canadensis nelsoni) are considered by most biologists to be a unique subspecies. Unlike their Rocky Mountain cousins, desert bighorn have adapted to hot, dry climates, and have longer legs, lighter coats and smaller bodies. Bighorn sheep are common in American Indian rock art, an indication of their presence and prominence in indigenous cultures.
Accounts from European explorers in the late 1600s estimate that more than two million desert bighorn once roamed the southwest. However, by the late 1800s bighorn sheep had disappeared or declined in many areas. Extremely vulnerable to diseases from European livestock, herd after herd of wild sheep were decimated by pathogens like scabies (an ear mite) and anthrax (a bacterial disease) introduced by domestic sheep. Bighorns were also killed by early explorers, settlers, and trophy hunters.
Increased human activity, competition with domesticated cattle and sheep for food and development are the biggest threats to the desert bighorn sheep today. For remaining herds to survive, intensive management and conservation measures may be necessary. Present and future protection of undeveloped land and wilderness areas are key to the species' survival.
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![Independence Monument Independence Monument](https://webarchive.library.unt.edu/eot2008/20090509085628im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/COLM_nxuw5vvt_Independence7.jpg) |
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Did You Know?
Independence Monument is all that remains of a continuous ridge that once formed a wall between Monument and Wedding canyons. A cap of durable Kayenta formation rock has protected this picturesque 450 ft. (137 meters) high monolith from the relentless erosion that carried away the surrounding rock.
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Last Updated: January 23, 2007 at 15:08 EST |