Polar bear vs yellow-necked mouse, yellow-necked field mouse

Ursus maritimus compared with Apodemus flavicollis

Key Differences

Polar bear is Vulnerable while yellow-necked mouse, yellow-necked field mouse is Near Threatened.

Taxonomic Classification

Rank	Polar bear	yellow-necked mouse, yellow-necked field mouse
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Carnivora (สัตว์กินเนื้อ)	Rodentia (อันดับสัตว์ฟันแทะ)
Family	Ursidae (Bears)	Muridae (Mice & Rats)
Genus	Ursus (Bears)	Apodemus
Species	Ursus maritimus	Apodemus flavicollis

Evolutionary Relationship

Polar bear and yellow-necked mouse, yellow-necked field mouse share a common ancestor at the Class level: Mammalia. (สัตว์เลี้ยงลูกด้วยน้ำนม)

ดู: Class: Mammalia

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

yellow-necked mouse, yellow-necked field mouse

NT — Near Threatened

Physical Characteristics

Attribute	Polar bear	yellow-necked mouse, yellow-necked 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.

yellow-necked mouse, yellow-necked field mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Russia, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.