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Share your observations of plants or non-game animals with the Natural Heritage Inventory

Rare animals
Find rare and non-game animals.
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Learn about plants on the Natural Heritage Working List.
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Discover Wisconsin's lichens.
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Contact information
For information on Wisconsin's rare animals, contact:
Rich Staffen
Conservation Biologist

Western Harvest Mouse (Reithrodontomys megalotis)



Western Harvest Mouse (Reithrodontomys megalotis) prefers dry and dry-mesic prairies, more or less open grassy places and neglected fields overgrown with grasses or sedges. In Wisconsin, it is restricted to the Driftless region and its borders. Breeding occurs throughout the year with the most activity occurring April-October. This species is not actively tracked in the Natural Heritage Inventory Database, but it could be tracked in the future if there is further evidence of its decline.

State status

Status and Natural Heritage Inventory documented occurrences in Wisconsin

The table below provides information about the protected status - both state and federal - and the rank (S and G Ranks) for Western Harvest Mouse (Reithrodontomys megalotis). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where occurrences of this species meet NHI data standards and is not meant as a comprehensive map of all observations.

Note: Species recently added to the NHI Working List may temporarily have blank occurrence maps.

Reithrodontomys megalotis is not tracked by the Wisconsin Natural Heritage Inventory Program at this time (this species is not on the NHI Working List).
Summary Information
State Statusnone
Federal Status in Wisconsinnone
State RankS3
Global RankG5
Tracked by NHIW

Species guidance

A guidance document is not available at this time. Use the information from the other tabs and contact local biologists, as needed, to develop management and avoidance strategies.

Other resources

Links to additional Western Harvest Mouse information

Other links related to mammals



Western Harvest Mouse

Western Harvest Mouse

Photo © Sharon Fandel.

Western Harvest Mouse

Western Harvest Mouse

Photo by Rich Staffen, WDNR.

Western Harvest Mouse

Photo © Ryan Stephens.

Western Harvest Mouse

Photo © Ryan Stephens.

Last revised: Monday, November 18, 2019