Keywords: glacier national park glaciernationalpark bighorn sheep bighornsheep wildlife animals mammals ungulates sheep ram bighorn herbivore alpine outdoor Bighorn sheep move in groups in Glacier's alpine and east side. Rams grow enormous horns (which differ from antlers in that they do not drop off yearly) that they use to batter each other during the rut every fall in competitions for mates. Photo: David Restivo, NPS Bighorn sheep move in groups in Glacier's alpine and east side. Rams grow enormous horns (which differ from antlers in that they do not drop off yearly) that they use to batter each other during the rut every fall in competitions for mates. Photo: David Restivo, NPS |