CR

San Esteban Deermouse

Peromyscus stephani

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Peromyscus stephani faces severe threats from habitat destruction due to agricultural expansion and urban development across its extremely limited range. The species' small population size makes it particularly vulnerable to stochastic events and genetic bottlenecks. Invasive plant species are altering the native vegetation structure that this mouse depends on for shelter and foraging.

Threat summary

Habitat

This critically endangered deer mouse inhabits dry scrubland and semi-arid grasslands with scattered shrubs, typically at elevations between 1,000-2,000 meters. The species requires areas with dense ground cover and rocky outcrops that provide shelter and nesting sites.

Rocky areas· major

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EN

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CR

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Unknown
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Frequently asked questions

Why is San Esteban Deermouse classified as Critically Endangered?
San Esteban Deermouse is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Peromyscus stephani faces severe threats from habitat destruction due to agricultural expansion and urban development across its extremely limited range. The species' small population size makes it particularly vulnerable to stochastic events and genetic bottlenecks. Invasive plant species are altering the native vegetation structure that this mouse depends on for shelter and foraging.
Where does San Esteban Deermouse live?
San Esteban Deermouse occurs in Mexico. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to San Esteban Deermouse?
The main threats to San Esteban Deermouse are 12.1, ai-1, ai-2, and ai-3. The full IUCN-classified threat record for this species is detailed on the species page.

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