European otter vs Olive Frog

Lutra lutra compared with Nidirana adenopleura

Key Differences

• European otter is Vulnerable while Olive Frog is Least Concern.

Taxonomic Classification

Rank	European otter	Olive Frog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Carnivora (Carnivorans)	Anura (Frogs & Toads)
Family	Mustelidae (Weasels & Otters)	Ranidae
Genus	Lutra (Otters)	Nidirana
Species	Lutra lutra	Nidirana adenopleura

Evolutionary Relationship

European otter and Olive Frog share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Olive Frog

LC — Least Concern

Physical Characteristics

Attribute	European otter	Olive Frog
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.

Olive Frog

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Taiwan.

European otter

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.