European otter vs Orinoco Four-eyed Opossum

Lutra lutra compared with Philander deltae

Key Differences

• European otter is Vulnerable while Orinoco Four-eyed Opossum is Least Concern.

Taxonomic Classification

Rank	European otter	Orinoco Four-eyed Opossum
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Mammalia (млекопитающие)	Mammalia (млекопитающие)
Order	Carnivora (хищные)	Didelphimorphia (Опоссумы)
Family	Mustelidae (Weasels & Otters)	Didelphidae
Genus	Lutra (Otters)	Philander
Species	Lutra lutra	Philander deltae

Evolutionary Relationship

European otter and Orinoco Four-eyed Opossum share a common ancestor at the Class level: Mammalia. (млекопитающие)

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Orinoco Four-eyed Opossum

LC — Least Concern

Physical Characteristics

Attribute	European otter	Orinoco Four-eyed Opossum
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.

Orinoco Four-eyed Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Venezuela.

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.