Caspian Shrew vs Eurasian Tree Sparrow

Crocidura caspica compared with Passer montanus

Key Differences

• Caspian Shrew is Data Deficient while Eurasian Tree Sparrow is Endangered.

Taxonomic Classification

Rank	Caspian Shrew	Eurasian Tree Sparrow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Soricomorpha (Soricomorpha)	Passeriformes (Songbirds)
Family	Soricidae	Passeridae
Genus	Crocidura	Passer
Species	Crocidura caspica	Passer montanus

Evolutionary Relationship

Caspian Shrew and Eurasian Tree Sparrow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Caspian Shrew

DD — Data Deficient

Eurasian Tree Sparrow

EN — Endangered

Physical Characteristics

Attribute	Caspian Shrew	Eurasian Tree Sparrow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Caspian Shrew

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Caspian Shrew

The Caspian Shrew (Crocidura caspica) is a species in the genus Crocidura. It is currently classified as Data Deficient 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.