The pronghorn, related to antelopes such as the gazelle or springbok, is the fastest land mammal in the Western Hemisphere, reaching speeds up to 55 mph for a half mile. Although there are no antelope species native to North America, that didn’t stop millions of American school children from singing about pronghorns in the song “Home on the Range” about the American West:
Home, home on the range,
Where the deer and the antelope play;
Where seldom is heard a discouraging word
And the skies are not cloudy all day.
Males have larger, pronged horns than females. Like their African brethren, pronghorn hang out in fields of grass or low shrubs, where they can spot predators and run to safety. Pronghorn neared extinction a hundred years ago, but they have rebounded since then. There are several hundred pronghorn in Yellowstone.
Fawns are born in late May, and twins are common. In late June we saw these two fawns nursing.
Below, the male stands between the road and two females and two fawns, watching.
We saw these pronghorns near the Lamar River west of the Tower Junction. The Lamar River valley is noted for its wildlife. We drove through there on our first full day in Yellowstone, and we kept going back.