Alder's necklace shell vs ours blanc

Euspira nitida compared with Ursus maritimus

Key Differences

• Alder's necklace shell is Least Concern while ours blanc is Vulnerable.

Taxonomic Classification

Rank	Alder's necklace shell	ours blanc
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Mollusca (mollusques)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Mammalia (mammifères)
Order	Littorinimorpha (Littorinimorpha)	Carnivora (carnivores)
Family	Naticidae	Ursidae (Bears)
Genus	Euspira	Ursus (Bears)
Species	Euspira nitida	Ursus maritimus

Evolutionary Relationship

Alder's necklace shell and ours blanc share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

Alder's necklace shell

LC — Least Concern

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Alder's necklace shell	ours blanc
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Alder's necklace shell

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Alder's necklace shell

The Alder's necklace shell (Euspira nitida) is a species in the genus Euspira. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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