Black-shouldered Opossum vs Eurasian Tree Sparrow

Caluromysiops irrupta compared with Passer montanus

Key Differences

• Black-shouldered Opossum is Least Concern while Eurasian Tree Sparrow is Endangered.

Taxonomic Classification

Rank	Black-shouldered Opossum	Eurasian Tree Sparrow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Didelphimorphia (Didelphimorphia)	Passeriformes (Songbirds)
Family	Didelphidae	Passeridae
Genus	Caluromysiops	Passer
Species	Caluromysiops irrupta	Passer montanus

Evolutionary Relationship

Black-shouldered Opossum and Eurasian Tree Sparrow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-shouldered Opossum

LC — Least Concern

Eurasian Tree Sparrow

EN — Endangered

Physical Characteristics

Attribute	Black-shouldered Opossum	Eurasian Tree Sparrow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-shouldered Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Eurasian Tree Sparrow

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. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Indonesia, Philippines, Singapore), Europe (7 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, Marshall Islands). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-shouldered Opossum

The Black-shouldered Opossum (Caluromysiops irrupta) is a species in the genus Caluromysiops. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Eurasian Tree Sparrow

Eurasian Tree Sparrow (Passer montanus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.