Common Sensitive-Plant vs Polar bear

Mimosa pudica compared with Ursus maritimus

Key Differences

Common Sensitive-Plant is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Common Sensitive-Plant	Polar bear
Kingdom	Plantae (植物)	Animalia (動物)
Phylum	Magnoliophyta (被子植物門)	Chordata (脊索動物)
Class	Magnoliopsida (モクレン綱)	Mammalia (哺乳類)
Order	Fabales (マメ目)	Carnivora (ネコ目)
Family	Fabaceae	Ursidae (Bears)
Genus	Mimosa	Ursus (Bears)
Species	Mimosa pudica	Ursus maritimus

Conservation Status

Common Sensitive-Plant

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Common Sensitive-Plant

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 9 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (22 countries), Asia (19 countries), Europe (Spain, Sweden), North America (5 countries), Oceania and the Pacific (13 countries), and South America (Brazil, 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 Sensitive-Plant

<em>Mimosa pudica</em>, the common sensitive plant, is a pantropical annual or perennial herb in the family Fabaceae, order Fabales, native to South and Central America but now naturalized across tropical Africa, Asia, Europe, North America, Oceania, and South America. This species is best known for its rapid thigmonastic leaf movements — leaflets and petioles fold inward and droop within seconds of being touched or disturbed, a response thought to deter herbivores and reduce water loss. <em>Mimosa pudica</em> typically grows as a sprawling, prickly herb in disturbed habitats including roadsides, pastures, and degraded lands, and produces small pink to purple spherical flower heads. The seeds are dispersed via various vectors and germinate readily, contributing to its success as an invasive species in many regions outside its native range. The species is listed as Least Concern by the IUCN, reflecting its wide distribution and high adaptability. Biological traits for this species remain poorly documented in the scientific literature in terms of standardized averages for lifespan, plant height, and weight, though its growth habit and ecological behavior as a pioneer and potential invasive are well characterized.

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。