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Pronghorns are fast mammals of America's western prairies and deserts. Males may weigh 36–70 kg (79–150 lb) (second photo). Females weight slightly less (first photo). They have beautiful brown and white marked coats. Males have interesting horns. While they are branched, they are not considered antlers. Another oddity about pronghorns is that they shed the outer horn sheath, again not very horn-like as horns are never shed.
Typically unbroken grasslands and deserts in western North America.
Pronghorns are also called antelope, but that is inappropriate as they are not antelopes or even closely allied to antelope. They are the fastest land mammal in North America reaching speeds of up to 60 miles per hour (about 86 km/hour). They may be the second fastest land mammal in the world, being bested only by the cheetah. Interestingly, there is no land predator within their range that would require this speed to escape. It's thought that the pronghorn may have evolved to escape the American cheetah, which is now extinct. I once was driving across Montana, many years ago, when I looked out the side window and found a herd of eight pronghorns keeping pace with my speed. I glanced at the speedometer and discovered I was driving about 65 mph. Up ahead was a three strand barbed wire fence that they would have to cross if they continued on their present course. Pronghorns never evolved a strategy of jumping fences and when they approached the fence I was amazed to see them to tuck their noses low and between their outstretched front legs and zip through the fence at full speed! There was an enormous puffs of hair as they in turn went through the fence. But they emerged, still at full speed, apparently unscathed.