House mice are introduced commensal rodents in New Jersey, and NatureServe’s SNA rank, not applicable, reflects that introduced species don’t receive a state conservation status. The 62 iNaturalist and 62 GBIF records here split evenly, an unusually balanced source mix for a species that’s typically either photograph-heavy or trap-heavy elsewhere, suggesting both casual sightings and structured survey work contribute to New Jersey’s record.
Records spike sharply in September, 13 sightings, more than double any other month and roughly a fifth of the year’s total, a pattern that likely tracks late-summer population growth spilling into visible spaces before autumn cooling pushes mice back indoors.
Full species profile
