Bamboo bear vs Common Stonewort

Ailuropoda melanoleuca compared with Chara vulgaris

Key Differences

Bamboo bear is Vulnerable while Common Stonewort is Endangered.

Taxonomic Classification

Rank	Bamboo bear	Common Stonewort
Kingdom	Animalia (動物)	Plantae (植物)
Phylum	Chordata (脊索動物)	Charophyta (車軸藻植物門)
Class	Mammalia (哺乳類)	Charophyceae (車軸藻綱)
Order	Carnivora (ネコ目)	Charales (車軸藻類)
Family	Ursidae (Bears)	Characeae
Genus	Ailuropoda (Giant Pandas)	Chara
Species	Ailuropoda melanoleuca	Chara vulgaris

Conservation Status

Bamboo bear

VU — Vulnerable

Population: ~1.9K

Trend: Increasing ↑

Common Stonewort

EN — Endangered

Physical Characteristics

Attribute	Bamboo bear	Common Stonewort
Diet	Herbivore	—
Average Lifespan	20 years	—
Average Length	1.5 m	—
Average Weight	100.0 kg	—

Habitat & Geographic Range

Bamboo bear

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate coniferous forests, and temperate broadleaf and mixed forests, among 7 distinct biome types spanning the Indomalayan and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Found in China. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Stonewort

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (Denmark, Norway, Sweden), North America (United States), and South America (Brazil). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Bamboo bear

ジャイアントパンダ（Ailuropoda melanoleuca）は中国中部の山岳竹林に生息し、体重最大125キログラムになるクマ科の動物で、食肉目に分類されながら食事の99%を竹が占める特異な食性を持つ。偽の親指（橈側種子骨）を使って竹の茎を把握し、1日14時間もの採食時間を費やす。2016年にIUCNレッドリストで絶滅危惧から危急（VU）へ改善されており、保護繁殖プログラムと自然保護区の設置が個体数回復に貢献している。

Common Stonewort

Chara vulgaris, the common stonewort, is a species of charophyte green alga in the family Characeae, order Charales. It typically grows submerged in freshwater habitats including ponds, lakes, ditches, and slow-moving streams, often forming dense mats on the substrate. The species has a broad geographic distribution spanning Asia, Europe, and the Americas, tolerating a range of water conditions from clear to moderately turbid. Chara vulgaris is notable for its heavily calcified, whorled structure that gives stoneworts their characteristic encrusted appearance and makes them valuable as paleoclimate indicators in sediment records. As a primary producer, it contributes to aquatic food webs and provides habitat for invertebrates and juvenile fish. Biological traits such as individual lifespan, precise growth rates, and specific consumer relationships remain poorly documented in the literature. Despite its wide range, Chara vulgaris is assessed as Endangered by the IUCN, reflecting significant population declines attributed to freshwater pollution, eutrophication, and habitat degradation across much of its range. Targeted conservation of clean, oligotrophic water bodies is essential for its persistence.