House mice are introduced commensal rodents in Louisiana, and NatureServe’s SNA rank, not applicable, reflects that introduced species don’t receive a state conservation status. Nearly all of the state’s 1,256 records, 1,247 of them, come from GBIF rather than casual photographs, meaning trapping and specimen collection, not people spotting mice, accounts for almost everything documented here. Grand Isle’s 6 logged sightings mark the top named site, consistent with a species that thrives around coastal development and structures.
November alone accounts for 365 of the 1,256 records, close to 30 percent of the entire year’s total, a dramatic spike that plausibly reflects a large concentrated trapping effort that fall rather than any real population surge, since house mice breed indoors year-round regardless of outside season.
Full species profile
