European otter vs Harmless Serotine

Lutra lutra compared with Eptesicus innoxius

Key Differences

• European otter is Vulnerable while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	European otter	Harmless Serotine
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Carnivora (ネコ目)	Chiroptera (翼手目)
Family	Mustelidae (Weasels & Otters)	Vespertilionidae
Genus	Lutra (Otters)	Eptesicus
Species	Lutra lutra	Eptesicus innoxius

Evolutionary Relationship

European otter and Harmless Serotine share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	European otter	Harmless Serotine
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.

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. 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。