Mammals

Discover the Mammals at Grand Canyon

34 Mammal Species Near the River

There are 34 species of mammals along the Colorado River corridor. Fifteen and eight of these are rodents and bats respectively. The park hasn’t seen any river otters since the previous decade. Muskrats are also quite rare. Nonetheless, the beaver population has increased in the wake of the construction of the Glen Canyon Dam. Beavers have a considerable impact on the riparian vegetation as they cut shrubs and willows. Other mammals that affect the various vegetations across the Grand Canyon include pocket mice and antelope squirrels.

The desert uplands are often a roosting place for Grand Canyon bats, which feed on the plethora of insects along the river. Besides the bats, skunks and coyotes are among the numerous predators in the area. There are also small populations of mountain lions, grey foxes and raccoons present in the area. You can also see hoofed mammals, such as desert bighorn sheep and mule deer along the river corridor as the Colorado River attracts these non-native mammals with food and water.

100+ Species in the Desert and Forest

Most the of 50 mammal species in the woodland scrub are bats and rodents. Woodrats have lived in the middens for generations. The bats visit the several caves found in the inner canyon for hunting or resting. Human excursions often disturb the maternity colonies. The caves need to be catalogued so better protective measures can be made for the mammals.



There are 52 mammal species that have a natural habitat in the conifer forests. These range from red squirrels and porcupines to elk and mule deer. You can see these at the higher elevations.

Threatened & Endangered Mammals at Grand Canyon

The following are on the list of Grand Canyon threatened and endangered mammals:

  • Long-legged Myotis
  • Western Red Bat
  • Spotted Bat
  • Pale Townsend’s Big-eared Bat
  • Allen’s Big-eared Bat
  • Greater Western Mastiff Bat
  • Southwest River Otter
  • Bighorn Sheep