Da xióngmāo vs Columbia River Signal Crayfish

Ailuropoda melanoleuca compared with Pacifastacus leniusculus

Key Differences

• Da xióngmāo is Vulnerable while Columbia River Signal Crayfish is Not Evaluated.

Taxonomic Classification

Rank	Da xióngmāo	Columbia River Signal Crayfish
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chordata (脊索动物门)	Arthropoda (节肢动物门)
Class	Mammalia (哺乳動物)	Malacostraca (软甲纲)
Order	Carnivora (食肉目)	Decapoda (十足目)
Family	Ursidae (Bears)	Astacidae
Genus	Ailuropoda (Giant Pandas)	Pacifastacus
Species	Ailuropoda melanoleuca	Pacifastacus leniusculus

Evolutionary Relationship

Da xióngmāo and Columbia River Signal Crayfish share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

Da xióngmāo

VU — Vulnerable

Population: ~1.9K

Trend: Increasing ↑

Columbia River Signal Crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	Da xióngmāo	Columbia River Signal Crayfish
Diet	Herbivore	—
Average Lifespan	20 years	—
Average Length	1.5 m	—
Average Weight	100.0 kg	—

Habitat & Geographic Range

Da xióngmāo

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.

Columbia River Signal Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Asia (Japan), Europe (26 countries), and North America (United States).

Da xióngmāo

大熊猫（Ailuropoda melanoleuca）是中国特有的濒危动物，以其黑白相间的体色和几乎完全依赖竹子的食性而闻名于世。该物种保护状态为易危（VU），是国际野生动物保护的旗舰物种，其种群数量近年来有所回升。

Columbia River Signal Crayfish

<em>Pacifastacus leniusculus</em>, the Columbia River signal crayfish, is a freshwater crustacean in the family Astacidae native to the Pacific Northwest of North America and widely introduced across Europe, Japan, and other regions. This species has not been evaluated by the IUCN but is recognised as one of the most ecologically damaging invasive freshwater species in Europe, present in 26 European countries, Japan, and its native range in the United States. Signal crayfish are large, aggressive, and highly fecund, capable of displacing native crayfish species through competition and through transmission of crayfish plague, a disease caused by the oomycete <em>Aphanomyces astaci</em>, to which North American crayfish have evolved resistance but European species have not. This species inhabits a wide range of freshwater environments including rivers, streams, lakes, and estuaries, as well as adjacent terrestrial habitats. Signal crayfish are omnivores, consuming aquatic plants, invertebrates, fish eggs, and organic detritus, and their burrowing activity can destabilise stream banks and increase turbidity. Management of invasive populations is a major focus of freshwater conservation in Europe. Biological traits of this species remain poorly documented in the scientific literature.