I photographed this herd of Pronghorns along the Lamar river banks in the Lamar Valley of Yellowstone National Park. Pronghorns can run at speeds close to 60 miles per hour. Although pronghorns are not as fast as cheetahs, they maintain a fast speed for a longer period of time than cheetahs.
Pronghorns form mixed-sex herds in the winter. In early spring the herds break up with young males forming bachelor groups, females forming their groups and adult males living a solitary life. There are female bands which share the same summer range and bachelor male bands form between spring and fall.
Cougars, wolves, coyotes and bobcats are the major predators. Golden Eagles have been reported to prey on fawns.
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