House mice aren’t native to Utah or anywhere in North America. They followed people out of Eurasia and now live almost anywhere buildings, barns, or stored grain give them shelter from the state’s dry climate. That’s why Utah’s 569 records turn up around developed areas near Uinta-Wasatch-Cache National Forest, Timpanogos Cave National Monument, and Utah Lake rather than deep backcountry, tracking human structures more than any particular wild habitat.
October is the year’s sharpest peak, 113 of 569 records, likely reflecting mice moving indoors as temperatures drop and becoming easier for people to notice, not a sudden population surge. NatureServe doesn’t rank the house mouse at all in Utah, listing it SNA, not applicable, the standard designation for an introduced species that sits outside the state’s native conservation framework.
Full species profile
