Cuenca nelson frog vs European otter

Ctenophryne aequatorialis compared with Lutra lutra

Key Differences

• Cuenca nelson frog is Endangered while European otter is Vulnerable.

Taxonomic Classification

Rank	Cuenca nelson frog	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Amphibia (Amphibians)	Mammalia (Mammals)
Order	Anura (Frogs & Toads)	Carnivora (Carnivorans)
Family	Microhylidae	Mustelidae (Weasels & Otters)
Genus	Ctenophryne	Lutra (Otters)
Species	Ctenophryne aequatorialis	Lutra lutra

Evolutionary Relationship

Cuenca nelson frog and European otter share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Cuenca nelson frog

EN — Endangered

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Cuenca nelson frog	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Cuenca nelson frog

Habitat

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

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.

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.