San Lorenzo Deermouse
CR

San Lorenzo Deermouse

Peromyscus interparietalis

Declining

Photo: (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)

Overview

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

Peromyscus interparietalis faces severe threats from habitat destruction due to agricultural expansion and urban development within its extremely limited range on San Lorenzo Island, Mexico. The species' restriction to a single small island makes it exceptionally vulnerable to introduced predators, particularly feral cats and rats that prey on native rodents. Climate change poses additional risks through altered precipitation patterns and potential sea-level rise affecting coastal habitats on this low-lying island.

Threat summary

Habitat

This critically endangered deer mouse is endemic to San Lorenzo Island in the Gulf of California, Mexico, where it inhabits arid scrubland and rocky coastal areas. The species occupies a variety of microhabitats including crevices among volcanic rocks, sparse vegetation patches, and areas near the shoreline where it forages for seeds and small invertebrates.

Frequently asked questions

Why is San Lorenzo Deermouse classified as Critically Endangered?
San Lorenzo 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 interparietalis faces severe threats from habitat destruction due to agricultural expansion and urban development within its extremely limited range on San Lorenzo Island, Mexico. The species' restriction to a single small island makes it exceptionally vulnerable to introduced predators, particularly feral cats and rats that prey on native rodents. Climate change poses additional risks through altered precipitation patterns and potential sea-level rise affecting coastal habitats on this low-lying island.
Where does San Lorenzo Deermouse live?
San Lorenzo 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 Lorenzo Deermouse?
The main threats to San Lorenzo Deermouse are 8.1, 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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