YELLOWSTONE NATIONAL PARK — According to Yellowstone National Park (YNP), November and December are when male pronghorns shed their horns before re-growing them in late winter.

When a pronghorn sheds its horns, YNP says what remains underneath is a permanent bony core around which the horn grows. Females also have very small horns, often less than six inches long, but they don’t shed them during a specific season.

YNP also writes on its website that the pronghorn is the surviving member of a group of animals that evolved in North America during the past 20 million years. While the pronghorn is not a true antelope, YNP suggests the name became synonymous with pronghorn during the 1804 to 1806 Lewis and Clark Expedition.

According to YNP, right now is a “great time of year” to catch the “American antelope” grazing around the North Entrance.

River Stingray is a news reporter with a passion for wildlife, history and local lenses. She holds a Master's degree in environmental archaeology from the University of Cambridge and is also a published poet, dog mom and outdoor enthusiast.