Cougar (Mountain Lion)
Arizona’s Grand Canyon National Park offers ideal habitat for cougars.

Arizona’s Grand Canyon National Park offers ideal habitat for cougars.
Only in winter do the perky ears of Abert’s squirrels grow tassels.
Brown bears vary in size and color depending on where they live.
Badgers will dig furiously to excavate underground prey.
Martens don’t like being exposed in the open.
Mink’s semi-webbed feet help them swim with skill.
Horn and body size determine rank, so the leader of this band is certainly the ram on the right.
Wolverines are tireless nomads, traveling many miles a day.
This wolf pack is chasing a deer that is running for its life.
The species was nearly exterminated for hides and sport.
White-tailed deer spend more time feeding than doing anything else.
The shy western gray squirrel prefers the seclusion of thick tree canopy.
This deer is also known as elk in North America.
The black-tailed jackrabbit (left) and antelope jackrabbit (right) are two different species.
Striped skunks can emit defensive musk at just two weeks old.
Lynx hearing and vision are excellent for tracking rabbits on the run.
Caribou, also known as reindeer, flourish in some of the world’s harshest places.
The skunk's handstand is a warning to discourage the ringtails.
Peccaries are sociable and often travel in herds of a dozen or more.
Coyotes have expanded their range into former wolf territory.
Eastern cottontails thrive in brambles bordering open fields.
Fishers can climb after a porcupine in a tree and attack from above.
Gray foxes shinny up trunks by gripping with their forelimbs while pushing with their hind paws.
Grizzly bears are actually the same species as the Alaska brown bears.
Groundhogs, also known as woodchucks, spend much of their lives underground.
Species in this mini-diorama include the Columbian mammoth and sabertooth cat.
The jaguar is the largest cat in the Americas.
No mammal is more sure-footed on steep peaks than the mountain goat.
Mule deer and white-tailed deer are very close relatives and overlap in range.
When the weather gets foul, musk oxen's strategy is to stay and cope.
All litters of this species derive from a single fertilized egg that divides into four.
The largest rodent on the continent, it's the only one that can cut down mature trees.
An agile skydiver, the northern flying squirrel doesn’t fly—it glides.
Few other North American mammals have adapted so readily to cities.
River otters use land only as a latrine and a bed.
The sewellel is the last living member of a once-successful family of rodents.
Dall sheep thrive where few mammals can, above the tree line on windy peaks in Alaska and northwest Canada.
Moose are the largest deer in the world.
Black bears eat almost anything, so they can survive in many landscapes.
Black-footed ferrets are North America’s rarest mammals.
Caribou are the only species of deer in which both sexes have antlers.
Each of the 43 dioramas in the stunningly restored Bernard Family Hall of North American Mammals offers a snapshot of North America’s rich environmental heritage. The hall, which first opened in 1942, focuses on 46 mammal species ranging from the nine-banded armadillo to white-tailed deer, and its dioramas are widely considered the finest in the world.
For more than a year, a team of artists, conservators, taxidermists, and designers worked to re-color faded fur, dust delicate leaves, and selectively restore the background paintings for the historic hall's reopening in October 2012. Text accompanying each diorama was updated to offer the latest scientific information about featured species.
Brown bears near the Gulf of Alaska reach huge sizes because of their nourishing salmon diet.
This diorama is set in the mid-1800s, when the prairies teemed with tens of millions of bison. A few decades later fewer than a thousand remained.
Arizona’s Grand Canyon National Park offers ideal habitat for cougars: shade to escape the heat, rugged terrain in which to ambush prey and nooks to eat carcasses in private.
In areas where wolves and cougars are still absent, coyotes act as top predators—although being smaller, they may scavenge as much big game as they catch.
Moose are the largest deer in the world. The biggest moose of all live in Alaska, where males can top 1,700 pounds (770 kilograms) and grow antlers 6.8 feet (2.1 meters) wide.