Mammals of the Niwot Ridge Biosphere Reserve
from Armstrong, David M., James C. Halfpenny, and Charles H. Southwick. 2001. Vertebrates, in Bowman, W.D. and Seastedt, T.R. Structure and Function of an Alpine Ecosystem, Niwot Ridge, Colorado. pp 128- 156. Oxford University Press, New York.
Insectivora: Soricidae
- Masked Shrew--Sorex cinereus
- Dwarf Shrew--Sorex nanus
- Montane Shrew--Sorex monticolus
- Lagomorpha: Ochotonidae
- American Pika--Ochotona princeps
Lagomorpha: Leporidae
- Snowshoe Hare--Lepus americanus
- White-tailed Jackrabbit--Lepus townsendii
Rodentia: Sciuridae
- Least Chipmunk--Tamias minimus
- Yellow-bellied Marmot--Marmota flaviventris
- Golden-mantled Ground Squirrel--Spermophilus lateralis
Rodentia: Geomyidae
- Northern Pocket Gopher--Thomomys talpoides
Rodentia: Muridae
- Deer Mouse--Peromyscus maniculatus
- Bushy-tailed Woodrat--Neotoma cinerea
- Southern Red-backed Vole--Clethrionomys gapperi
- Heather Vole--Phenacomys intermedius
- Montane Vole--Microtus montanus
- Long-tailed Vole--Microtus longicaudus
Rodentia: Zapodidae
- Western Jumping Mouse--Zapus princeps
Rodentia: Erethizontidae
- Porcupine--Erethizon dorsatum
Carnivora: Canidae
- Coyote--Canis latrans
- Gray Wolf--Canis lupus †
- Red Fox--Vulpes vulpes
Carnivora: Ursidae
- Black Bear--Ursus americanus
- Grizzly Bear--Ursus arctos †
Carnivora: Mustelidae
- American Marten--Martes americana
- Short-tailed Weasel--Mustela erminea
- Long-tailed Weasel--Mustela frenata
- American Badger--Taxidea taxus
Carnivora: Felidae
- Mountain Lion--Felis concolor
- Bobcat--Felis rufus
Artiodactyla: Cervidae
- Wapiti, or American Elk--Cervus elaphus
- Mule Deer--Odocoileus hemionus
Artiodactyla: Bovidae
- Bison--Bison bison †
- Bighorn Sheep--Ovis canadensis
† = extirpated within historic time
