Common Fat-tailed Mouse Opossum vs Lǎohǔ

Thylamys pusillus compared with Panthera tigris

Key Differences

• Common Fat-tailed Mouse Opossum is Least Concern while Lǎohǔ is Endangered.

Taxonomic Classification

Rank	Common Fat-tailed Mouse Opossum	Lǎohǔ
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	Felidae (Cats)
Genus	Thylamys	Panthera (Big Cats)
Species	Thylamys pusillus	Panthera tigris

Evolutionary Relationship

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

Conservation Status

Common Fat-tailed Mouse Opossum

LC — Least Concern

Lǎohǔ

EN — Endangered

Population: ~4.5K

Trend: Increasing ↑

Physical Characteristics

Attribute	Common Fat-tailed Mouse Opossum	Lǎohǔ
Diet	—	Carnivore
Average Lifespan	—	20 years
Average Length	—	3.0 m
Average Weight	—	220.0 kg

Habitat & Geographic Range

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Lǎohǔ

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 6 distinct biome types spanning the Neotropic and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Colombia and Ecuador. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Lǎohǔ

地球上最大的野生猫科动物，体重可超过300千克，栖息于从俄罗斯远东到东南亚的森林中。独居埋伏捕食者，具有独特的橙色和黑色条纹皮毛，在斑驳光线中提供伪装。由于偷猎和森林砍伐，野外种群减少至不足4,000只，被列为极危（CR）物种。