House mice are introduced commensal rodents in South Dakota, and NatureServe’s SNA rank, not applicable, reflects that introduced species don’t receive a state conservation status. The record here is heavily GBIF-weighted, 31 records against just 3 from iNaturalist, more than ten to one, suggesting structured survey or trapping data, not casual sightings near buildings, drives most of what’s documented about this species in the state.
The small handful of casually observed records scatter across four months with a modest November peak (2 sightings), too sparse a pattern to describe any real seasonal trend in a dataset this thin.
Full species profile
