Arizona mammals

Plains Harvest Mouse in Arizona

Reithrodontomys montanus

Native to Arizona S3 Vulnerable 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.

Plains Harvest Mouse in Arizona, by the numbers

Rare in Arizona 145th most recorded of 158 mammals logged in Arizona

59 occurrence records

Records from 2000–2026.

59 total records count every Arizona occurrence from GBIF and iNaturalist; the monthly chart covers the 57 records with a full observation date.

When to look for the Plains Harvest Mouse in Arizona

Most sightings fall in February.

57 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
January4
February17
March7
April12
May2
June0
July0
August3
September2
October6
November3
December1

Monthly plains harvest mouse occurrence records (iNaturalist and GBIF) in Arizona, 2000–2026.

Seasonality

Year-round in Arizona, with recorded sightings peaking in February, with a smaller rise in April.

Occurrence map

Where Plains Harvest Mouse has been recorded in Arizona

59 records mapped · zoom and drag to explore

59 Arizona records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
State Trust Land 1
Coconino National Forest 1

Protected places with the most plains harvest mouse 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 38
Pima County 6
Yavapai County 6
Santa Cruz County 5
Pinal County 2
Graham County 1
Greenlee County 1

The complete county distribution, spread across 7 Arizona counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Plains harvest mouse reaches only the northeastern grassland fringe of Arizona, at the southwestern edge of a range centered on the Great Plains. With just one logged sighting, in November, it sits near the very bottom of the state’s mammal record.

A single record this thin can’t support any seasonal claim; it simply confirms the species’ presence at the edge of its range rather than describing when it’s actually active.

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"