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Desert Bighorn Sheep

Ovis canadensis nelsoni

Photo by Jaybird
Published on Project Noah
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37.2187, -112.941

Field Notes

Description:

Desert bighorn are stocky, heavy-bodied sheep, similar in size to mule deer. oth sexes develop horns soon after birth, with horn growth continuing more or less throughout life. Older rams have impressive sets of curling horns measuring over three feet long with more than one foot of circumference at the base. The ewes' horns are much smaller and lighter and do not tend to curl. The head and horns of an adult ram may weigh more than 30 pounds. Annual growth rings indicate the animal's age. Both rams and ewes use their horns as tools to break open cactus, which they consume, and for fighting.

Habitat:

Ponderosa forest in rocky steppe approximately 7500 ft. elevation.

Notes:

Rocky Mountain bighorns (Ovis canadensis canadensis) are generally recognized to have inhabited northern and central Utah, whereas desert bighorns (Ovis canadensis nelsoni) were found in southern Utah.

“Mountain sheep, like all other native fauna and flora, are part of the structure and heritage of North America. Despite all of the efforts exerted toward their conservation, wild sheep face a precarious future. They are an ecologically fragile species, adapted to limited habitats that are increasingly fragmented. Future conservation efforts will only be successful if land managers are able to minimize fragmentation. According mountain sheep their rightful share of North America and allowing them to inhabit the wilderness regions they require is a responsibility all Americans must shoulder. It is our moral and ethical obligation never to relent in the struggle to ensure their survival.”

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