House mice are introduced commensal rodents in Iowa, and NatureServe’s SNA rank, not applicable, reflects that introduced species don’t receive a state conservation status. GBIF specimen data (91 records) outnumbers iNaturalist sightings (17) more than five to one, meaning trapping surveys, not casual photographs, drive most of what’s documented about this species in the state.
August alone accounts for 16 of the year’s 28 monthly-tallied records, well over half, a sharp late-summer spike that likely tracks population growth spilling into visible spaces before autumn cooling pushes mice back indoors.
Full species profile
