Arizona mammals

Tawny-Bellied Cotton Rat in Arizona

Sigmodon fulviventer

Native to Arizona S4 Apparently Secure in Arizona

Not listed as nonindigenous in Arizona by USGS NAS; native to its Arizona range.

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.

Tawny-Bellied Cotton Rat in Arizona, by the numbers

Rare in Arizona 114th most recorded of 158 mammals logged in Arizona

115 occurrence records

Records from 2000–2026.

When to look for the Tawny-Bellied Cotton Rat in Arizona

Most sightings fall in August to October.

115 Arizona occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Arizona records (table)
MonthRecords
January7
February5
March17
April5
May4
June0
July8
August17
September17
October22
November7
December6

Monthly tawny-bellied cotton rat occurrence records (iNaturalist and GBIF) in Arizona, 2000–2026.

Seasonality

Year-round in Arizona, with recorded sightings peaking in August–October, with a smaller rise in March.

Occurrence map

Where Tawny-Bellied Cotton Rat has been recorded in Arizona

115 records mapped · zoom and drag to explore

115 Arizona records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
State Trust Land 6

Protected places with the most tawny-bellied cotton rat sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in Arizona

CountyRecords
Cochise County 73
Santa Cruz County 16
Graham County 16
Pima County 9
Greenlee County 1

The complete county distribution, spread across 5 Arizona counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Tawny-bellied cotton rat is a grassland specialist of Arizona’s southeastern plains, at the northwestern edge of a range centered on Mexico’s high grasslands. Its bottom-third record fits a species living at the margin of suitable habitat in the state.

October carries the bulk of the year’s sightings, 11 of the total, likely reflecting a concentrated fall trapping survey rather than a true autumn population spike; the sparse record in other months says more about survey timing than about the cotton rat’s real activity pattern.

More mammals in Arizona 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
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"