common large wetland moss vs Polar bear

Calliergonella cuspidata compared with Ursus maritimus

Key Differences

common large wetland moss is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	common large wetland moss	Polar bear
Kingdom	Plantae (植物)	Animalia (動物)
Phylum	Bryophyta	Chordata (脊索動物)
Class	Bryopsida (マゴケ綱)	Mammalia (哺乳類)
Order	Hypnales (ハイゴケ目)	Carnivora (ネコ目)
Family	Pylaisiaceae	Ursidae (Bears)
Genus	Calliergonella	Ursus (Bears)
Species	Calliergonella cuspidata	Ursus maritimus

Conservation Status

common large wetland moss

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

common large wetland moss

Habitat

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

Range

Widely distributed across Europe (6 countries), North America (United States), and South America (Brazil, Chile, Colombia).

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.

common large wetland moss

Common Large Wetland Moss (<em>Calliergonella cuspidata</em>) is a pleurocarpous moss in the family Calliergonaceae, classified as Least Concern on the IUCN Red List. It is native to Europe (six countries), North America (United States), and South America (Brazil, Chile, and Colombia), reflecting a distribution across both hemispheres. The species typically grows in wet grasslands, fens, marshes, lake margins, and other damp habitats where it forms extensive, often dominant mats. Its pointed shoot tips and cushion-forming growth habit are characteristic features. This moss plays an important ecological role in wetland ecosystems, contributing to peat formation, water retention, and providing microhabitats for invertebrates and other small organisms. Its broad distribution across Europe, North America, and South America and stable population dynamics support its Least Concern assessment. Biological traits of this species remain poorly documented in the scientific literature.

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。