Altai Birch Mouse vs Big Finner

Sicista napaea compared with Balaenoptera physalus

Key Differences

• Altai Birch Mouse is Least Concern while Big Finner is Endangered.

Taxonomic Classification

Rank	Altai Birch Mouse	Big Finner
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum same	Chordata (حبليات)	Chordata (حبليات)
Class same	Mammalia (ثدييات)	Mammalia (ثدييات)
Order	Rodentia (قوارض)	Cetacea (Whales & Dolphins)
Family	Dipodidae	Balaenopteridae (Rorquals)
Genus	Sicista	Balaenoptera (Rorquals)
Species	Sicista napaea	Balaenoptera physalus

Evolutionary Relationship

Altai Birch Mouse and Big Finner share a common ancestor at the Class level: Mammalia. (ثدييات)

Conservation Status

Altai Birch Mouse

LC — Least Concern

Big Finner

EN — Endangered

Physical Characteristics

Attribute	Altai Birch Mouse	Big Finner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Altai Birch Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Altai Birch Mouse

The Altai Birch Mouse (Sicista napaea) is a species in the genus Sicista. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Big Finner

Big Finner (Balaenoptera physalus) 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.