Polar bear vs

Ursus maritimus compared with Sphingomonas yunnanensis

Key Differences

• Polar bear is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Polar bear
Kingdom	Animalia (สัตว์)	Bacteria (Bacteria)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Proteobacteria (Proteobacteria)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Alphaproteobacteria (Alphaproteobacteria)
Order	Carnivora (สัตว์กินเนื้อ)	Sphingomonadales (Sphingomonadales)
Family	Ursidae (Bears)	Sphingomonadaceae
Genus	Ursus (Bears)	Sphingomonas
Species	Ursus maritimus	Sphingomonas yunnanensis

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear
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.

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan.

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.

Sphingomonas yunnanensis is a Gram-negative alphaproteobacterium in the family Sphingomonadaceae, isolated from soil in Yunnan Province, China. It forms yellow-pigmented colonies and contains glycosphingolipids in its outer membrane, a hallmark of the genus. Sphingomonas species are widely distributed in soils, freshwater, and plant surfaces, and some are capable of degrading complex aromatic compounds.