This is a list of mammals observed in the U.S. state of Utah. * Abert's squirrel (Sciurus aberti) * Allen's big-eared bat (Idionycteris phyllotis) * American badger (Taxidea taxus) * American bison (Bison bison) * American black bear (Ursus americanus) * American ermine (Mustela richardsonii) * American pika (Ochotona princeps) * American red squirrel (Tamiasciurus hudsonicus) * American water shrew (Sorex palustris) * Arizona woodrat (Neotoma devia) * American mink (Neogale vison) * Belding's ground squirrel (Urocitellus beldingi) * Big brown bat (Eptesicus fuscus) * Big free-tailed bat (Nyctinomops macrotis) * Black rat (Rattus rattus) introduced * Black-footed ferret (Mustela nigripes) * Black-tailed jackrabbit (Lepus californicus) * Bobcat (Lynx rufus) * Botta's pock