Blue-black Tooth vs Polar bear

Phellodon atratus compared with Ursus maritimus

Key Differences

• Blue-black Tooth is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Blue-black Tooth	Polar bear
Kingdom	Fungi (菌界)	Animalia (動物)
Phylum	Basidiomycota (担子菌門)	Chordata (脊索動物)
Class	Agaricomycetes (真正担子菌綱)	Mammalia (哺乳類)
Order	Thelephorales (イボタケ目)	Carnivora (ネコ目)
Family	Thelephoraceae	Ursidae (Bears)
Genus	Phellodon	Ursus (Bears)
Species	Phellodon atratus	Ursus maritimus

Conservation Status

Blue-black Tooth

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Blue-black Tooth	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Blue-black Tooth

Habitat

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

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.

Blue-black Tooth

The Blue-black Tooth (Phellodon atratus) is a species in the genus Phellodon. It is currently classified as Least Concern on the IUCN Red List. Typically found in forest floors, decomposing wood, and soil ecosystems.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。