vs Polar bear

Coleroa robertiani compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Fungi (菌界)	Animalia (動物)
Phylum	Ascomycota (子嚢菌門)	Chordata (脊索動物)
Class	Dothideomycetes (クロイボタケ綱)	Mammalia (哺乳類)
Order	Venturiales (Venturiales)	Carnivora (ネコ目)
Family	Venturiaceae	Ursidae (Bears)
Genus	Coleroa	Ursus (Bears)
Species	Coleroa robertiani	Ursus maritimus

Conservation Status

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Norway, Portugal, Sweden, 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.

Coleroa robertiani is an ascomycete fungus in the family Phacidiaceae, specialized as a parasite or saprotrophic organism on herb-Robert (Geranium robertianum) and related geraniums (family Geraniaceae). The species produces small, dark apothecia on senescent or infected leaf tissue, releasing ascospores that perpetuate the fungal life cycle. Like other Coleroa species, it forms characteristic setose (bristle-bearing) fruiting bodies that anchor to host plant surfaces. This fungus is recorded primarily from temperate European regions where Geranium robertianum grows in shaded, moist habitats such as hedgerows, woodland edges, and rocky slopes. Its host specificity to Geraniaceae reflects co-evolutionary relationships between fungal lineages and particular plant families. Coleroa robertiani is generally not considered an economically significant pathogen given the weed or naturalized status of its host plants in many areas, but it plays a role in regulating wild Geranium populations and cycling nutrients through decomposition of infected tissue. As with many microfungi on minor hosts, detailed ecological and distributional data are sparse, and molecular phylogenetic studies continue to refine its classification within the broader Rhytismatales.

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。