European otter vs Ontong Java Flying Fox

Lutra lutra compared with Pteropus howensis

Key Differences

• European otter is Vulnerable while Ontong Java Flying Fox is Critically Endangered.

Taxonomic Classification

Rank	European otter	Ontong Java Flying Fox
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Carnivora (Carnivorans)	Chiroptera (Bats)
Family	Mustelidae (Weasels & Otters)	Pteropodidae (Fruit Bats)
Genus	Lutra (Otters)	Pteropus (Flying Foxes)
Species	Lutra lutra	Pteropus howensis

Evolutionary Relationship

European otter and Ontong Java Flying Fox share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Ontong Java Flying Fox

CR — Critically Endangered

Physical Characteristics

Attribute	European otter	Ontong Java Flying Fox
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.

Ontong Java Flying Fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.