European otter vs Amerika-aka-ei

Lutra lutra compared with Hypanus americanus

Key Differences

European otter is Vulnerable while Amerika-aka-ei is Near Threatened.

Taxonomic Classification

Rank	European otter	Amerika-aka-ei
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Elasmobranchii
Order	Carnivora (ネコ目)	Myliobatiformes (トビエイ目)
Family	Mustelidae (Weasels & Otters)	Dasyatidae
Genus	Lutra (Otters)	Hypanus
Species	Lutra lutra	Hypanus americanus

Evolutionary Relationship

European otter and Amerika-aka-ei share a common ancestor at the Phylum level: Chordata. (脊索動物)

表示 Phylum: Chordata

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Amerika-aka-ei

NT — Near Threatened

Physical Characteristics

Attribute	European otter	Amerika-aka-ei
Diet	Carnivore	—
Average Lifespan	10 years	—
Average Length	1.0 m	—
Average Weight	10.0 kg	—

Habitat & Geographic Range

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Amerika-aka-ei

Habitat

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

Range

Found in Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

European otter

ヨーロッパカワウソ（Lutra lutra）はヨーロッパとアジア全域の清流、渓流、海岸線に生息するスリムな半水生のイタチ科動物です。体長最大1.3メートルに達し、敏感なヒゲで獲物の動きを感知して魚を狩る非常に優れた能力を持っています。豊富な魚がいる汚染されていない水が必要で、淡水生態系の健全性の指標種として知られています。かつて狩猟と汚染によって西ヨーロッパでほぼ絶滅の危機に瀕していましたが、水質改善に伴い個体数が大幅に回復しました。