Atlantic Stream Crayfish vs ours blanc

Austropotamobius pallipes compared with Ursus maritimus

Key Differences

• Atlantic Stream Crayfish is Endangered while ours blanc is Vulnerable.

Taxonomic Classification

Rank	Atlantic Stream Crayfish	ours blanc
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Arthropoda (arthropodes)	Chordata (Chordates)
Class	Malacostraca (Crustaceans)	Mammalia (mammifères)
Order	Decapoda (Decapoda)	Carnivora (carnivores)
Family	Astacidae	Ursidae (Bears)
Genus	Austropotamobius	Ursus (Bears)
Species	Austropotamobius pallipes	Ursus maritimus

Evolutionary Relationship

Atlantic Stream Crayfish and ours blanc share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

Atlantic Stream Crayfish

EN — Endangered

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Stream Crayfish	ours blanc
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Atlantic Stream Crayfish

Habitat

Inhabits temperate broadleaf and mixed forests and temperate coniferous forests within the Palearctic biogeographic realm.

Range

Distributed across Ireland and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

Atlantic Stream Crayfish

The Atlantic Stream Crayfish (Austropotamobius pallipes) is a species in the genus Austropotamobius. It is currently classified as Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and temperate coniferous forests within the Palearctic biogeographic realm.

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.