Bog Shadow vs Colombian Oldfield Mouse

Arrhenia umbratilis compared with Thomasomys dispar

Key Differences

• Bog Shadow is Not Evaluated while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Bog Shadow	Colombian Oldfield Mouse
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (Mammals)
Order	Agaricales (Gilled Mushrooms)	Rodentia (Rodents)
Family	Hygrophoraceae	Cricetidae
Genus	Arrhenia	Thomasomys
Species	Arrhenia umbratilis	Thomasomys dispar

Conservation Status

Bog Shadow

NE — Not Evaluated

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Bog Shadow	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bog Shadow

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Norway and Sweden.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Bog Shadow

The Bog Shadow (Arrhenia umbratilis) is a species in the genus Arrhenia. Distributed across 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.