Colombian Oldfield Mouse vs Jarrah

Thomasomys dispar compared with Eucalyptus marginata

Key Differences

• Colombian Oldfield Mouse is Data Deficient while Jarrah is Near Threatened.

Taxonomic Classification

Rank	Colombian Oldfield Mouse	Jarrah
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Rodentia (Rodents)	Myrtales (Myrtales)
Family	Cricetidae	Myrtaceae
Genus	Thomasomys	Eucalyptus
Species	Thomasomys dispar	Eucalyptus marginata

Conservation Status

Colombian Oldfield Mouse

DD — Data Deficient

Jarrah

NT — Near Threatened

Physical Characteristics

Attribute	Colombian Oldfield Mouse	Jarrah
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Jarrah

Habitat

Inhabits deserts and xeric shrublands within the Afrotropic biogeographic realm.

Range

Distributed across Taiwan, United States, and Yemen. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Colombian Oldfield Mouse

<em>Thomasomys dispar</em>, commonly known as the Colombian Oldfield Mouse, is a small rodent species belonging to the genus <em>Thomasomys</em> within the family Cricetidae. This species is classified as Data Deficient, indicating that insufficient information is currently available to evaluate its conservation status with confidence. It has been documented in Colombia, where it inhabits diverse terrestrial and aquatic-adjacent environments. Members of the genus <em>Thomasomys</em> are typically associated with high-altitude Andean habitats, including páramo grasslands, shrublands, and montane forest edges, where they occupy ground-level microhabitats and burrow in soft soils. These mice are generally omnivorous, consuming seeds, plant material, and invertebrates, though specific dietary data for <em>Thomasomys dispar</em> have not been recorded. Biological traits of this species remain poorly documented in the scientific literature. The Data Deficient classification highlights the need for targeted surveys in Colombian Andean regions to determine population size, distribution, and the ecological requirements of this poorly known rodent.