ours blanc vs swollen river mussel

Ursus maritimus compared with Unio tumidus

Key Differences

• ours blanc is Vulnerable while swollen river mussel is Least Concern.

Taxonomic Classification

Rank	ours blanc	swollen river mussel
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Chordata (Chordates)	Mollusca (mollusques)
Class	Mammalia (mammifères)	Bivalvia (Bivalvia)
Order	Carnivora (carnivores)	Unionida (Unionoida)
Family	Ursidae (Bears)	Unionidae
Genus	Ursus (Bears)	Unio
Species	Ursus maritimus	Unio tumidus

Evolutionary Relationship

ours blanc and swollen river mussel share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

swollen river mussel

LC — Least Concern

Physical Characteristics

Attribute	ours blanc	swollen river mussel
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

ours blanc

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.

swollen river mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

ours blanc

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