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Bighorn sheep

The bighorn sheep (Ovis canadensis)[6] is a species of sheep native to North America.[7] It is named for its large horns. A pair of horns might weigh up to 14 kg (30 lb);[8] the sheep typically weigh up to 143 kg (315 lb).[9] Recent genetic testing indicates three distinct subspecies of Ovis canadensis, one of which is endangered: O. c. sierrae.

This article is about the animal. For other uses, see Big Horn (disambiguation).

Sheep originally crossed to North America over the Bering Land Bridge from Siberia; the population in North America peaked in the millions, and the bighorn sheep entered into the mythology of Native Americans. By 1900, the population had crashed to several thousand due to diseases introduced through European livestock and overhunting.[10]

Rocky Mountain bighorn sheep, O. c. canadensis, found from to Arizona.

British Columbia

† (or Audubon's bighorn sheep), O. c. auduboni, occurred in North Dakota, South Dakota, Montana, Wyoming, and Nebraska. This subspecies has been extinct since 1925.

Badlands bighorn sheep

California bighorn sheep, O. c. californiana, found from British Columbia south to and east to North Dakota. The definition of this subspecies has been updated (see below).

California

O. c. nelsoni, the most common desert bighorn sheep, ranges from California through Arizona.

Desert bighorn sheep

Mexican bighorn sheep, O. c. mexicana, ranges from Arizona and south to Sonora and Chihuahua.

New Mexico

Peninsular bighorn sheep O. c. cremnobates, occur in the of California and Baja California

Peninsular Ranges

Weems' bighorn sheep, O. c. weemsi, found in southern Baja California.

Photos & Information on Wild Rocky Mountain Bighorn Sheep in Nevada

BIGHORN.org

Rocky Mountain bighorn research

Greater Yellowstone Resource Guide – Bighorn Sheep

Archived 2012-09-26 at the Wayback Machine California Department of Fish and Game

Desert Bighorn Sheep Facts

Smithsonian Museum of Natural History: Ovis canadensis