Black Witches' Butter vs Polar bear

Exidia glandulosa compared with Ursus maritimus

Key Differences

Black Witches' Butter is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Black Witches' Butter	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	Auriculariales (キクラゲ目)	Carnivora (ネコ目)
Family	Auriculariaceae	Ursidae (Bears)
Genus	Exidia	Ursus (Bears)
Species	Exidia glandulosa	Ursus maritimus

Conservation Status

Black Witches' Butter

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Black Witches' Butter	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Black Witches' Butter

Habitat

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

Range

Distributed across Denmark, Norway, Sweden, Taiwan, 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.

Black Witches' Butter

The Black Witches' Butter (Exidia glandulosa) is a species in the genus Exidia. It is currently classified as Least Concern on the IUCN Red List. Distributed across Denmark, Norway, Sweden, Taiwan, and United States.

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。