The bighorn sheep (Ovis canadensis) is a species of sheep that lives in the western half of North America. They live in North America. Their name was given to them because of their large horns. Their horns can weigh up to 30 pounds (14 kg). However, the sheep themselves weigh up to 300 pounds (140 kg).
- Sierra Nevada bighorn (O. c. sierrae) (endangered)
- Desert bighorn (O. c. nelsoni)
- Rocky Mountain bighorn (O. c. canadensis)
- Ovis canadensis auduboni (extinct)
Adult male bighorn sheep can weigh 350 lbs (159 kg) and stand 40 inches (102 cm) tall at the shoulder. Adult female sheep are as heavy as 250 lbs (113 kg). They are grayish brown to dark brown in color with white faces and rear ends. This makes them difficult to see when the ground is part snow and part grass.
All bighorn sheep have horns. They stay on their heads their whole lives. They do not fall off the way antlers do. Male bighorn sheep have large, curved horns that curl around their faces. Female bighorn sheep have shorter horns with sharp points.
Bighorn sheep live in herds. Male sheep live in herds with only other adult males. These are called bachelor herds. Female sheep live in herds with other adult females and lambs. When male sheep are two years old, they leave their mother's herd and find a bachelor herd.
Bighorn sheep eat many kinds of plants. They have four-part stomachs. They feed on plants in lowlands and then go back to the rocks, where they can chew their cud and digest the food. Desert sheep can eat cacti.
When it is time for the sheep to mate, the adult male rams run toward each other and hit each other with their horns. This makes a loud noise. The rams' skulls are thick and strong.
By 1900, the population got smaller to several thousands.Almost all the bighorn sheep in the Rocky Mountains died in the 1800s and early 1900s. Hunters killed them for meat and horns. Bighorn sheep caught diseases from ranch sheep. Many organizations, including the Boy Scouts of America, has helped increase the population.
- Festa-Bianchet, M. (2020). "Bighorn Sheep: Ovis canadensis". IUCN Red List of Threatened Species. The IUCN Red List of Threatened Species. 2020: e.T15735A22146699. doi:10.2305/IUCN.UK.2020-2.RLTS.T15735A22146699.en. Retrieved July 22, 2021.
- "Bighorn Sheep". United States National Park Service. Retrieved July 22, 2021.
- "Desert Bighorn Sheep". United States Fish and Wildlife Service. Retrieved July 22, 2021.
- "Bighorn Sheep". National Wildlife Foundation. Retrieved July 22, 2021.
- Allen J.A. 1912.  Archived 2015-05-07 at the Wayback Machine Historical and nomenclatorial notes on North American sheep. Bulletin of the AMNH v. 31, article 1
- "Peninsular Desert Bighorn Sheep". California Department of Fish and Wildlife. Retrieved July 22, 2021.
- "Thinhorn Sheep IN BRITISH COLUMBIA" (PDF). British Columbia Ministry of Environment, Lands and Parks. Retrieved July 23, 2021.
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