Smithsonian National Museum of Natural History, North American Mammals
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Urocitellus canus

Merriam's Ground Squirrel

Order: Rodentia
Family: Sciuridae

Image of Urocitellus canus
Spermophilus canus - distinguishable from S. mollis and S. townsendii only by chromosome number and location
Click to enlarge. (91 kb)

Conservation Status: Least Concern.


Merriam's Ground Squirrels live in high desert habitat dominated by big sagebrush, western juniper, and greasewood, and are also found in grasslands and agricultural lands. They eat grasses and forbs. Like other ground squirrels, they are active in the daytime—when they are active at all. They emerge from hibernation in the spring, and disappear underground again in August. One litter is produced each spring. Until recently, Merriam's Ground Squirrel, the Piute Ground Squirrel, and Townsend's Ground Squirrel were all classified as one species, but their chromosome counts are different: Townsend's has 36 chromosomes, Piute 38, and Merriam's 46, enough genetic difference to classify them as three separate species.

Also known as:
Townsend's Ground Squirrel, Malheur Valley Ground Squirrel, Sage Squirrel, Sage Rat

Length:
Average: 201 mm
Range: 190-217 mm

References:

Merriam, C.H., 1898.  Proceedings of the Biological Society of Washington, 12:70.

Links:

Mammal Species of the World

Distribution of Urocitellus canus