brown bear vs Eastern Spiny Mouse

Ursus arctos compared with Acomys dimidiatus

Key Differences

• brown bear is Extinct while Eastern Spiny Mouse is Least Concern.

Taxonomic Classification

Rank	brown bear	Eastern Spiny Mouse
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum same	Chordata (حبليات)	Chordata (حبليات)
Class same	Mammalia (ثدييات)	Mammalia (ثدييات)
Order	Carnivora (لواحم)	Rodentia (قوارض)
Family	Ursidae (Bears)	Muridae (Mice & Rats)
Genus	Ursus (Bears)	Acomys
Species	Ursus arctos	Acomys dimidiatus

Evolutionary Relationship

brown bear and Eastern Spiny Mouse share a common ancestor at the Class level: Mammalia. (ثدييات)

Conservation Status

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

Eastern Spiny Mouse

LC — Least Concern

Physical Characteristics

Attribute	brown bear	Eastern Spiny Mouse
Diet	Omnivore	—
Average Lifespan	25 years	—
Average Length	2.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

Eastern Spiny Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

brown bear

The world's most widely distributed bear species, brown bears range from North America and Europe across Russia to Japan, occupying forests, tundra, and alpine meadows. Adults can weigh up to 700 kg in coastal Alaskan populations. Omnivores that consume berries, roots, fish, and carrion, brown bears are a keystone species that distribute nutrients across landscapes. Most populations are stable, though some subspecies are threatened.