Common Fat-tailed Mouse Opossum vs Common Ivy

Thylamys pusillus compared with Hedera helix

Taxonomic Classification

Rank	Common Fat-tailed Mouse Opossum	Common Ivy
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Didelphimorphia (Didelphimorphia)	Apiales (Apiales)
Family	Didelphidae	Araliaceae
Genus	Thylamys	Hedera
Species	Thylamys pusillus	Hedera helix

Conservation Status

Common Fat-tailed Mouse Opossum

LC — Least Concern

Common Ivy

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Common Ivy

Habitat

Found across multiple habitat types including temperate coniferous forests, montane grasslands and shrublands, and Mediterranean forests and woodlands within the Palearctic biogeographic realm.

Range

Widely distributed across Africa (5 countries), Asia (4 countries), Europe (6 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia, New Zealand), and South America (7 countries).

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.

Common Ivy

<em>Hedera helix</em>, commonly known as common ivy or English ivy, is a woody evergreen climber and groundcover in the family Araliaceae. It is classified as Least Concern on the IUCN Red List, with a very wide global distribution across the Palearctic realm and beyond, encompassing temperate and Mediterranean habitats. The species is native to Europe and western Asia and has been widely introduced elsewhere. It typically grows in woodlands, hedgerows, cliffs, walls, and urban green spaces, tolerating deep shade and a wide range of soil conditions. Common ivy provides important ecological services, offering shelter and late-season nectar and fruit resources for wildlife. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.