Norway rats are an introduced commensal species in Vermont, and NatureServe’s SNA rank, not applicable, reflects that introduced species don’t receive a state conservation status. With 60 records split fairly evenly between iNaturalist (56) and GBIF (50), reporting here leans more toward casual sightings than trapping data, likely because rats near buildings and farms are easy for people to photograph and report.
Records stay remarkably flat across the year, four to six sightings most months, with a single modest bump to 8 in April; that steadiness fits a species that breeds year-round and doesn’t migrate or hibernate, so its visibility mostly reflects observer activity rather than any real seasonal cycle in the rat population itself.
Full species profile
