Polar bear vs Small Japanese Field Mouse

Ursus maritimus compared with Apodemus argenteus

Key Differences

• Polar bear is Vulnerable while Small Japanese Field Mouse is Least Concern.

Taxonomic Classification

Rank	Polar bear	Small Japanese Field Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Carnivora (carnívoros)	Rodentia (Roedores)
Family	Ursidae (Bears)	Muridae (Mice & Rats)
Genus	Ursus (Bears)	Apodemus
Species	Ursus maritimus	Apodemus argenteus

Evolutionary Relationship

Polar bear and Small Japanese Field Mouse share a common ancestor at the Class level: Mammalia. (mamíferos)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Small Japanese Field Mouse

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Small Japanese Field Mouse
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Small Japanese Field Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Polar bear

O maior carnivoro terrestre da Terra, o urso-polar pode ultrapassar 700 kg e e encontrado pelo gelo marinho artico, do Canada ate a Russia. Mamiferos marinhos altamente especializados que dependem do gelo marinho para cacas de focas e focas-barbadas. Excelentes nadadores capazes de percorrer grandes distancias em aguas abertas. Classificado como Vulneravel, com populacoes sob severa pressao devido a rapida perda de gelo marinho artico causada pelas mudancas climaticas.