Polar bear vs Retrovert Pteropod

Ursus maritimus compared with Limacina retroversa

Key Differences

• Polar bear is Vulnerable while Retrovert Pteropod is Not Evaluated.

Taxonomic Classification

Rank	Polar bear	Retrovert Pteropod
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum	Chordata (حبليات)	Mollusca (رخويات)
Class	Mammalia (ثدييات)	Gastropoda (بطنيات القدم)
Order	Carnivora (لواحم)	Pteropoda (جناحيات الأرجل)
Family	Ursidae (Bears)	Limacinidae
Genus	Ursus (Bears)	Limacina
Species	Ursus maritimus	Limacina retroversa

Evolutionary Relationship

Polar bear and Retrovert Pteropod share a common ancestor at the Kingdom level: Animalia. (حيوانات)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Retrovert Pteropod

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear	Retrovert Pteropod
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.

Retrovert Pteropod

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Denmark, Norway, and Sweden.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway