Bank Vole vs Common Fat-tailed Mouse Opossum

Myodes glareolus compared with Thylamys pusillus

Taxonomic Classification

Rank	Bank Vole	Common Fat-tailed Mouse Opossum
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Rodentia (ネズミ目)	Didelphimorphia (Didelphimorphia)
Family	Cricetidae	Didelphidae
Genus	Myodes	Thylamys
Species	Myodes glareolus	Thylamys pusillus

Evolutionary Relationship

Bank Vole and Common Fat-tailed Mouse Opossum share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Bank Vole

LC — Least Concern

Common Fat-tailed Mouse Opossum

LC — Least Concern

Physical Characteristics

Attribute	Bank Vole	Common Fat-tailed Mouse Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bank Vole

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (5 countries) and North America (Canada).

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Bank Vole

ヨーロッパモリネズミ（Myodes glareolus）は、IUCNレッドリストで軽度懸念（LC）に分類されています。分布域全体にわたって広く生息し個体数も豊富で、個体群は安定しており、差し迫った保全上の懸念はありません。

Common Fat-tailed Mouse Opossum

The Common Fat-tailed Mouse Opossum (<em>Thylamys pusillus</em>) is a small marsupial belonging to the genus Thylamys within the family Didelphidae. Like other members of its genus, this species typically stores fat in its tail, which becomes swollen during periods of food abundance and is metabolised during leaner times, a physiological adaptation that provides energy reserves. <em>Thylamys pusillus</em> is generally found in diverse terrestrial and aquatic ecosystems, often in dry woodlands, scrublands, and grassland habitats of South America. The species is assessed as Least Concern on the IUCN Red List, indicating it is not currently considered at risk of extinction. Detailed geographic range data are not available in the current record, but members of this genus are typically distributed across parts of Argentina, Bolivia, Paraguay, and Uruguay. Biological traits including average lifespan, body dimensions, and specific dietary composition remain poorly documented in the scientific literature, though Thylamys species are generally considered omnivorous, often consuming insects, small vertebrates, and plant material.