FFacts On Tap Editorial Team Fact-checkedUpdated April 24, 20254 min read
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Pronghorns, often called "pronghorn antelope" even though they aren't true antelopes at all, are among North America's most remarkable mammals. Built for speed and built to last, they roam the grasslands and high deserts of the American West and have survived predators, brutal winters, and near-extinction to become one of the continent's great conservation success stories.
From their bizarre branching horns to their record-setting migrations, here's what makes pronghorns one of the most unique animals on the continent.
Pronghorns are the fastest land mammal in North America and the second-fastest land animal on Earth after the cheetah, capable of running up to 55-60 mph.
Unlike cheetahs, which can only sprint for short bursts, pronghorns can sustain speeds of 30-40 mph for miles at a time, making them nearly impossible for predators to run down.
Pronghorns are not true antelopes at all; they belong to their own unique family, Antilocapridae, and are more closely related to giraffes than to African antelope.
Pronghorns are the only animals in the world with branched horns, and they are also the only horned animal that sheds the outer sheath of its horns every year, regrowing it annually.
Pronghorns have exceptionally large eyes for their body size and a wide field of vision, often cited around 320 degrees, letting them spot movement and predators from several miles away.
Scientists believe pronghorns evolved their extreme speed to escape the now-extinct American cheetah, which died out roughly 12,000 years ago along with other Ice Age predators.
Pronghorns are herbivores that feed on grasses, sagebrush, forbs, and shrubs, adjusting their diet seasonally based on what's available.
During the fall breeding season, dominant males defend territories or harems of females; after a gestation period of about 7.5 to 8 months, does typically give birth to one or two fawns in late spring.
Pronghorn fawns can outrun a human within days of birth and can reach speeds of around 25 mph in their first few weeks of life.
Pronghorns range from southern Canada through the western and central United States down into northern Mexico, thriving in habitats from cold prairies to hot deserts.
They are social animals that typically gather in small herds, but these groups can swell to hundreds of individuals during migration or in winter.
Some pronghorn herds make one of the longest land migrations in the continental United States, traveling roughly 150 miles one-way between summer range in places like Grand Teton National Park and winter range near Pinedale, Wyoming.
Pronghorns were once nearly wiped out by overhunting and habitat loss, with populations crashing from an estimated 35 million to under 20,000 by the early 1900s.
Thanks to conservation efforts and hunting regulations, pronghorn populations have rebounded to roughly 700,000 to 1,000,000 animals today, and the species is listed as Least Concern by the IUCN.
Pronghorns generally live 9-10 years in the wild, though some individuals survive past 15 in the right conditions.
Because pronghorns evolved to outrun predators rather than jump over obstacles, they are reluctant to leap fences and instead crawl under them, which is why modern fencing and highways can seriously disrupt their migration routes.
Frequently asked questions
What is the lifespan of a pronghorn?
Pronghorns typically live 9-10 years in the wild, though some individuals can live past 15 under ideal conditions.
How do pronghorns defend themselves from predators?
Their main defense is raw speed and endurance, reaching up to 55-60 mph and sustaining fast paces for miles, combined with excellent eyesight that lets them spot danger from far away.
Can pronghorns be found outside North America?
No. Pronghorns are native only to North America, ranging from southern Canada through the western United States to northern Mexico.
What challenges do pronghorns face today?
While not currently endangered, pronghorns face habitat fragmentation from fencing, roads, and development, which can block the traditional migration routes they rely on.
How many pronghorns are there in the wild?
Current estimates put the pronghorn population at roughly 700,000 to 1,000,000 animals, a major recovery from fewer than 20,000 in the early 1900s.
Why is pronghorn migration so important?
Migration lets pronghorn herds follow seasonal food and avoid harsh winters, and routes like the Path of the Pronghorn between Grand Teton National Park and Wyoming's Green River Basin are among the longest land migrations left in the Lower 48.
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