Colombian Oldfield Mouse vs Baummarder, Edelmarder

Thomasomys dispar compared with Martes martes

Key Differences

• Colombian Oldfield Mouse is Data Deficient while Baummarder, Edelmarder is Critically Endangered.

Taxonomic Classification

Rank	Colombian Oldfield Mouse	Baummarder, Edelmarder
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order	Rodentia (Nagetiere)	Carnivora (Raubtiere)
Family	Cricetidae	Mustelidae (Weasels & Otters)
Genus	Thomasomys	Martes
Species	Thomasomys dispar	Martes martes

Evolutionary Relationship

Colombian Oldfield Mouse and Baummarder, Edelmarder share a common ancestor at the Class level: Mammalia. (Säugetiere)

Conservation Status

Colombian Oldfield Mouse

DD — Data Deficient

Baummarder, Edelmarder

CR — Critically Endangered

Physical Characteristics

Attribute	Colombian Oldfield Mouse	Baummarder, Edelmarder
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.

Baummarder, Edelmarder

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (6 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Baummarder, Edelmarder

European pine marten (Martes martes) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.