Arctic lemming vs Colombian Oldfield Mouse

Dicrostonyx torquatus compared with Thomasomys dispar

Key Differences

• Arctic lemming is Least Concern while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Arctic lemming	Colombian Oldfield Mouse
Kingdom same	Animalia (hewan)	Animalia (hewan)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (mamalia)	Mammalia (mamalia)
Order same	Rodentia (hewan pengerat)	Rodentia (hewan pengerat)
Family same	Cricetidae	Cricetidae
Genus	Dicrostonyx	Thomasomys
Species	Dicrostonyx torquatus	Thomasomys dispar

Evolutionary Relationship

Arctic lemming and Colombian Oldfield Mouse share a common ancestor at the Family level: Cricetidae.

Conservation Status

Arctic lemming

LC — Least Concern

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Arctic lemming	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arctic lemming

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Arctic lemming

The Arctic lemming (Dicrostonyx torquatus) is a species in the genus Dicrostonyx. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.