Pronghorns are about three feet (one meter) tall at the shoulders. They are reddish brown, but feature white stomachs and wide, white stripes on their throats.
During summer, pronghorns disperse, browsing and sunning in small loosely formed bands. Does form groups of up to a dozen; they usually wander away from the band to give birth, and then rejoin it a few weeks later with their fawns.
Pronghorns under pressure
Yellowstone
Industrial development undermines winter grazing grounds.
Pronghorns are deer-like mammals that have light-brown fur on their body, a white belly, a white rump, and black markings on their face and neck. Their head and eyes are large and they have a stout body.
Pronghorns are the fastest mammals in North America; they can run over 50 miles per hour (80 kph). These graceful mammals are the only living animal with doubly-branched horns. Pronghorns are closely related to antelopes.
Pronghorns are some of the fastest animals on Earth. Although they cannot match the speed of the cheetah, pronghorns can run very fast for much longer. Some pronghorns have been known to run at 25-30 miles per hour for over 15 miles.
Pronghorns are thought to have evolved during the Pleistocene (1.8 million to 10,000 years ago) with a cheetahlike cat, which explains their great speed.
The pronghorn is the only animal in the world whose horns are branched or pronged.
Pronghorns travel in small herds of 2 to 15 animals. They signal each other by raising the white hair on their rumps, which flashes in the sunlight for long distances in the relative flatness of the prairies.
Pronghorns have a particular fondness for flowers and fruits. The flowers of cutleaf daisy, white daisy, stickleaf, paper flower, and woolly senecio are consumed in large amounts.
Pronghorns have excellent vision, and it has been suggested that the position of their eyes, high up on their skulls, is an adaptation that allows them to maintain vigilance for predators while they continue to crop vegetation on the ground.
Pronghorns
Although known commonly as antelopes to ranchers"and singers of "Home on the Range""pronghorn are not true antelopes, technically speaking. Their eponymous pronged horns demonstrate why.
Pronghorns inhabit and can be seen (with a pair of good binoculars) in a number desert locations: ...
When baby Pronghorns are born in the spring and early summer, the female hides her young ones and returns to them three or more times a day so they can nurse. They are able to walk and run when they are only about a week old.
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At one time pronghorns were numerous in the western United States and were doomed for extinction , but now have protection in national forests and parks .
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PRONGHORN
Pronghorns are the fastest moving mammals in North America.
QUAGGA
The Quagga is a recently-extinct relative of the zebra.
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For additional information
Sonoran Pronghorn Antelope ...
Geist, V. 1990. Pronghorns. In Grzimek's Encyclopedia of Mammals. Edited by S. P. Parker. New York: McGraw-Hill. pp. 278-285.
Nowak, R. M. [editor]. 1991. Walker's Mammals of the World (Fifth Edition). Baltimore: The Johns Hopkins University Press.
Pronghorns live in the open prairie where speed is essential for survival. It is the fastest hoofed animal in the world, cruising at 30 mph, but reaching over 50 mph in short bursts.
Birth and fawn bed site selection by pronghorns in a sagebrush-steppe community. Journal of Wildlife Management. 55(2): 222-227. [15468] 2. Allen, Arthur W.; Cook, John G.; Armbruster, Michael J. 1984. Habitat suitability index models: Pronghorn.
Pronghorns live in small bands on open plains. Chiefly browsers, they feed largely on sagebrush and other shrubs, but also eat grasses. The swiftest of North American mammals, they attain speeds of 60 mi (96 km) per hr, but are poor jumpers.
Life Cycle In the southern part of their range, pronghorns mate in the late summer. In the northern part of their range they mate in the early fall. Males will fight over females. A male may mate with more than one female.
Pronghorns are the fastest mammals on foot in the Western Hemisphere, capable of sprints up to 97 kilometers (60 miles) per hour. They carry the only forked horns in the world, and the only horns that are shed annually.
Pronghorns are true American natives, found nowhere else in the world. they have roamed the plains and deserts of North America for at least the last million years in substantially the same form.
Change of Diet: This mostly black bird with white wingtips once fed on bison and pronghorns, but when those populations were depleted by overhunting in the 19th century, food became hard to come by.
They flash their white rumps somewhat as pronghorns do when they are running. Their ears are white on the outside, and longer than average.
The pronghorn is the fastest land animal in North America. Traffic, recreation, and other human disturbances are driving pronghorns from their open grassland, sagebrush, and desert habitats.
Tibetan Antelope ...
Historically, the Mountain Plover nested in prairies inhabited by larger grazing animals, such as bison, pronghorns, and prairie dogs. The decline of these species has coincided with the decline of the Mountain Plover.
The oldest relatives of today's deer, cows and bison, antelopes, and pronghorns all appeared in the Miocene, while most of the families of small artiodactyls that had appeared in the Eocene disappeared at about this time.
 See also: Pronghorn, Antelope, Deer, Coyote, Bison
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