National Geographic : 1939 Jul
© National Geographic Society Kodachrome byHendell Chapman STATUES IN SILHOUETTE AGAINST A WINTER SKY, PRONGHORNS WATCH TENSELY AS A COYOTE MOVES ONADISTANT HILL When snows retard their speed, the animals are more wary than ever. They eat sagebrush in winter,because grass issodeeply covered that they cannot paw it out. Sometimes, in severe weather, they come down from the rough Devil's Slide country, north ofYellowstone, tolower farming lands, seeking forage. The pronghorns are a distinct family. Their hollow horns are shed each year and new ones develop over the remaining bony core.