Kentucky mammals

Norway Rat in Kentucky

Rattus norvegicus

Introduced to Kentucky

Kentucky's Rattus norvegicus records are of an introduced species; it does not occur here as a wild native population.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Norway Rat in Kentucky, by the numbers

Occasional in Kentucky 51st most recorded of 77 mammals logged in Kentucky

17 occurrence records
10 with iNaturalist photos

Records from 2000–2026.

When to look for the Norway Rat in Kentucky

Most sightings fall in September.

17 Kentucky occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly Kentucky records (table)
MonthRecords
January1
February0
March0
April0
May1
June1
July3
August2
September5
October1
November2
December1

Monthly norway rat occurrence records (iNaturalist and GBIF) in Kentucky, 2000–2026.

Seasonality

Year-round in Kentucky, with recorded sightings peaking in September, with a smaller rise in July.

Occurrence map

Where Norway Rat has been recorded in Kentucky

17 records mapped · zoom and drag to explore

17 Kentucky records mapped

Where it's recorded in Kentucky

CountyRecords
Jefferson County 6
Fayette County 6
McCracken County 2
Bourbon County 1
Harlan County 1
Mercer County 1

The complete county distribution, spread across 6 Kentucky counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Norway rat records in Kentucky trace back to greenways, wooded river corridors, and the edges of state parks, sites where buildings and human activity meet otherwise natural land. NatureServe flags the species as exotic; it arrived with European settlement rather than being part of Kentucky’s native fauna.

September carries the largest share of the year’s 14 records, with scattered single counts elsewhere, a pattern that likely reflects pest-survey timing more than a true seasonal peak for an introduced species that can turn up near structures any time of year.

Occurrence data from GBIF.

More mammals in Kentucky in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries