Eurasian Tree Sparrow vs Indonesian Mountain Weasel

Passer montanus compared with Mustela lutreolina

Key Differences

• Eurasian Tree Sparrow is Endangered while Indonesian Mountain Weasel is Least Concern.

Taxonomic Classification

Rank	Eurasian Tree Sparrow	Indonesian Mountain Weasel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Passeriformes (Songbirds)	Carnivora (Carnivorans)
Family	Passeridae	Mustelidae (Weasels & Otters)
Genus	Passer	Mustela
Species	Passer montanus	Mustela lutreolina

Evolutionary Relationship

Eurasian Tree Sparrow and Indonesian Mountain Weasel share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian Tree Sparrow

EN — Endangered

Indonesian Mountain Weasel

LC — Least Concern

Physical Characteristics

Attribute	Eurasian Tree Sparrow	Indonesian Mountain Weasel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Indonesian Mountain Weasel

Habitat

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.