Delicate Pygmy Rice Rat vs European otter

Oligoryzomys delicatus compared with Lutra lutra

Key Differences

• Delicate Pygmy Rice Rat is Data Deficient while European otter is Vulnerable.

Taxonomic Classification

Rank	Delicate Pygmy Rice Rat	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Carnivora (Carnivorans)
Family	Cricetidae	Mustelidae (Weasels & Otters)
Genus	Oligoryzomys	Lutra (Otters)
Species	Oligoryzomys delicatus	Lutra lutra

Evolutionary Relationship

Delicate Pygmy Rice Rat and European otter share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Delicate Pygmy Rice Rat

DD — Data Deficient

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Delicate Pygmy Rice Rat	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Delicate Pygmy Rice Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Ecuador.

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.