Colombian Oldfield Mouse vs Feltleaf Willow

Thomasomys dispar compared with Salix alaxensis

Key Differences

• Colombian Oldfield Mouse is Data Deficient while Feltleaf Willow is Not Evaluated.

Taxonomic Classification

Rank	Colombian Oldfield Mouse	Feltleaf Willow
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Rodentia (Rodents)	Malpighiales (Malpighiales)
Family	Cricetidae	Salicaceae
Genus	Thomasomys	Salix
Species	Thomasomys dispar	Salix alaxensis

Conservation Status

Colombian Oldfield Mouse

DD — Data Deficient

Feltleaf Willow

NE — Not Evaluated

Physical Characteristics

Attribute	Colombian Oldfield Mouse	Feltleaf Willow
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.

Feltleaf Willow

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Iceland, Norway, and Sweden.

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.