Brown-Toothed Crust Fungus vs Polar bear

Hydnoporia olivacea compared with Ursus maritimus

Key Differences

Brown-Toothed Crust Fungus is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Brown-Toothed Crust Fungus	Polar bear
Kingdom	Fungi (เห็ดรา)	Animalia (สัตว์)
Phylum	Basidiomycota (Club Fungi)	Chordata (สัตว์มีแกนสันหลัง)
Class	Agaricomycetes (Mushrooms)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Hymenochaetales (Hymenochaetales)	Carnivora (สัตว์กินเนื้อ)
Family	Hymenochaetaceae	Ursidae (Bears)
Genus	Hydnoporia	Ursus (Bears)
Species	Hydnoporia olivacea	Ursus maritimus

Conservation Status

Brown-Toothed Crust Fungus

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brown-Toothed Crust Fungus	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Brown-Toothed Crust Fungus

Habitat

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

Range

Distributed across Norway and United States.

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.

Brown-Toothed Crust Fungus

The Brown-toothed Crust Fungus (Hydnoporia olivacea) is a species in the genus Hydnoporia. Typically found in forest floors, decomposing wood, and soil ecosystems. Distributed across Norway and United States.

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.