 The adults may have also used their horns to defend themselves and their calves from predators, such as hyaenodonts, entelodonts, "Bathornis" or nimravids.Fossils were uncovered in the northern plains states.Life-sized models of "Megacerops" families (a male, female, and juvenile) are displayed at the James E. Martin Paleontological Research Laboratory, South Dakota School of Mines & Technology, and a different set at the Canadian Museum of Nature.