• View of Grand Canyon National Park at sunset from the South Rim

    Grand Canyon

    National Park Arizona

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  • Expect Moderate Thunderstorm Activity Through the Weekend

    Monsoonal weather patterns have moved into the Grand Canyon area decreasing fire danger. As a result, on Tuesday, July 8 at 8 a.m. fire managers lifted fire restrictions within Grand Canyon National Park. More »

  • Two Bats Collected in the Park Have Tested Positive for Rabies

    One on the North Kaibab Trail and the other at Tusayan Ruin/Museum. Any persons having physical contact with bats in Grand Canyon National Park, please call 928-638-7779. Rabies can be prevented if appropriate medical care is given following an exposure. More »

Mammals

Riparian:
Of the 34 mammal species found along the Colorado River corridor, 15 are rodents and eight are bats. River otters may have disappeared from the park in the last decade and muskrats are extremely rare. However, an increase in the population size and distribution of beavers has occurred seen since the construction of Glen Canyon Dam. Beavers cut willows, cottonwoods, and shrubs for food, and can significantly affect the riparian vegetation. Other rodents, such as antelope squirrels and pocket mice, are mostly omnivorous, using many different vegetation types. Grand Canyon bats typically roost in desert uplands, but forage on the abundance of insects along the river and its tributaries.

In addition to bats, coyotes, ringtails, and spotted skunks are the most numerous riparian predators. They prey on invertebrates, rodents, and reptiles. Raccoon, weasel, bobcat, gray fox, and mountain lion are also present, but are much more rare. Mule deer and desert bighorn sheep are the ungulates that frequent the river corridor. Mule deer are generally not permanent residents along the river, but travel down from the rim when food and water resources there become scarce.

Desert Scrub:
The mammalian fauna in the woodland scrub community consists of 50 species, mostly rodents and bats. Three of the five Park woodrat species live in the desert scrub community. Many generations of woodrats inhabit the same middens, which can serve as valuable indicators of past climatic conditions and associated vegetation. Numerous caves in the inner canyon provide roost sites for migratory and resident bats. Maternity colonies are especially prone to disturbance from human exploration, and greater efforts are needed to inventory park caves for bats and establish protective measures where necessary.

Coniferous Forest:
The conifer forests provide habitat for 52 mammal species. Porcupines, shrews, red squirrels, tassel eared Kaibab and Abert squirrels, black bear, mule deer, and elk are found at the park's higher elevations on the Kaibab Plateau.

It is illegal to approach or feed wildlife in Grand Canyon National Park


 

Related Information About Mammals

A Biologist’s Biologist: Remembering Eric York
Grand Canyon National Park biologist Eric York unexpectedly passed away in the fall of 2007. Learn about Eric’s research on the park’s mountain lions and share in our remembrance of this great man. Park staff honor Eric each day by carrying on his research, and by sharing his passion for big cats, wildlife and wild places.

Mountain Lion Research at Grand Canyon
In 2003, National Park Service wildlife biologists at Grand Canyon National Park initiated a radiotelemetry study of mountain lions in and around the park. The purpose of this study is to gather information about lion behavior, including predation habits, reproductive activity, habitat selection, and other behaviors.


Check Lists

Mammals of Grand Canyon NP (69kb PDF File)

Grand Canyon Invertebrate Species Collection (1.7MB XLS File)
Grand Canyon Vertebrate Animal Species List (223kb PDF File)

Grand Canyon Threatened & Endangered Species List (52kb PDF File)

Arizona Game and Fish Web Site


 

Did You Know?

WHITEWATER RAFTING

There are different river trip opportunities through Grand Canyon National Park, including professionally guided raft trips, available to the public and often reserved a year or two in advance; and self-guided, or "private" river trips, made available to the public through a weighted lottery. More...