
While pronghorn have been called "the American antelope," they are no relation to the antelopes found in Africa.

Pronghorn are the fastest distance runners on earth, reaching speeds of more than 50 miles per hour.

The Grand Teton pronghorn migrate farther than any other mammal in the Americas, aside from caribou.

The pronghorn is the sole species in the Greater Yellowstone ecosystem that is native only to the American West.

Pronghorn are much stronger sprinters than they are jumpers. Wide-ranging livestock fencing is putting them in an increasingly tight spot.

Photo credits: Bear grass and moon at twilight, © Randy Beacham. Pronghorn Antelope, © Istock. Slideshow Photos: 1 - © Istock , 2 & 5 - © Wendy Shattil & Bob Rozinski, 3 & 4 - © Windland Rice, courtesy of Jeff Rice