Common Fat-tailed Mouse Opossum vs Red Fox

Thylamys pusillus compared with Vulpes vulpes

Taxonomic Classification

Rank	Common Fat-tailed Mouse Opossum	Red Fox
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Didelphimorphia (负鼠目)	Carnivora (食肉目)
Family	Didelphidae	Canidae (Dogs & Wolves)
Genus	Thylamys	Vulpes (Foxes)
Species	Thylamys pusillus	Vulpes vulpes

Evolutionary Relationship

Common Fat-tailed Mouse Opossum and Red Fox share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

Common Fat-tailed Mouse Opossum

LC — Least Concern

Red Fox

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Common Fat-tailed Mouse Opossum	Red Fox
Diet	—	Omnivore
Average Lifespan	—	5 years
Average Length	—	70 cm
Average Weight	—	6.0 kg

Habitat & Geographic Range

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Red Fox

Habitat

Typically found in a wide range of habitat types.

Range

Widely distributed across Asia (Cyprus, Israel), Europe (8 countries), North America (United States), Oceania and the Pacific (Australia), and South America (Argentina).

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.

Red Fox

赤狐（Vulpes vulpes）是地球上分布最广的野生肉食动物，在北半球及澳大利亚引入区域，从北极冻原到城市环境的各类栖息地均有分布。以锈红色皮毛、白色腹部和蓬松尾巴为特征。高度适应性强的杂食者，从兔子、田鼠到水果、人类垃圾无所不食。可用40余种不同的叫声进行交流。