Grey Bolete vs ours blanc

Retiboletus griseus compared with Ursus maritimus

Key Differences

• Grey Bolete is Not Evaluated while ours blanc is Vulnerable.

Taxonomic Classification

Rank	Grey Bolete	ours blanc
Kingdom	Fungi (Fungi)	Animalia (animal)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (mammifères)
Order	Boletales (Boletales)	Carnivora (carnivores)
Family	Boletaceae	Ursidae (Bears)
Genus	Retiboletus	Ursus (Bears)
Species	Retiboletus griseus	Ursus maritimus

Conservation Status

Grey Bolete

NE — Not Evaluated

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Grey Bolete	ours blanc
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Grey Bolete

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Found in United States.

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.

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.