Polar bear vs Willow Brittlegill

Ursus maritimus compared with Russula laccata

Key Differences

Polar bear is Vulnerable while Willow Brittlegill is Least Concern.

Taxonomic Classification

Rank	Polar bear	Willow Brittlegill
Kingdom	Animalia (สัตว์)	Fungi (เห็ดรา)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Basidiomycota (Club Fungi)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Agaricomycetes (Mushrooms)
Order	Carnivora (สัตว์กินเนื้อ)	Russulales (Russulales)
Family	Ursidae (Bears)	Russulaceae
Genus	Ursus (Bears)	Russula
Species	Ursus maritimus	Russula laccata

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Willow Brittlegill

LC — Least Concern

Physical Characteristics

Attribute	Polar bear	Willow Brittlegill
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.

Willow Brittlegill

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.