Polar bear vs semi-ribbed spire snail

Ursus maritimus compared with Onoba semicostata

Key Differences

Polar bear is Vulnerable while semi-ribbed spire snail is Least Concern.

Taxonomic Classification

Rank	Polar bear	semi-ribbed spire snail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Carnivora (Carnivorans)	Littorinimorpha (Littorinimorpha)
Family	Ursidae (Bears)	Rissoidae
Genus	Ursus (Bears)	Onoba
Species	Ursus maritimus	Onoba semicostata

Evolutionary Relationship

Polar bear and semi-ribbed spire snail share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

semi-ribbed spire snail

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	semi-ribbed spire snail
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.

semi-ribbed spire snail

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and 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.