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 113th most recorded of 158 mammals logged in Arizona

16 occurrence records
1 with iNaturalist photos

Records from 2000–2026.

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

Most sightings fall in October.

16 Arizona 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 Arizona records (table)
MonthRecords
January0
February0
March0
April0
May1
June0
July2
August1
September1
October11
November0
December0

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

Seasonality

Year-round in Arizona, with recorded sightings peaking in October.

Occurrence map

Where Tawny-Bellied Cotton Rat has been recorded in Arizona

16 records mapped · zoom and drag to explore

16 Arizona records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
State Trust Land 1

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 15
Santa Cruz County 1

The complete county distribution, spread across 2 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"