Bolivian red howler vs European otter

Alouatta sara compared with Lutra lutra

Key Differences

• Bolivian red howler is Near Threatened while European otter is Vulnerable.

Taxonomic Classification

Rank	Bolivian red howler	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Primates (Primates)	Carnivora (Carnivorans)
Family	Atelidae	Mustelidae (Weasels & Otters)
Genus	Alouatta	Lutra (Otters)
Species	Alouatta sara	Lutra lutra

Evolutionary Relationship

Bolivian red howler and European otter share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Bolivian red howler

NT — Near Threatened

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Bolivian red howler	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Bolivian red howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Bolivian red howler

The Bolivian red howler (Alouatta sara) is a species in the genus Alouatta. It is currently classified as Near Threatened on the IUCN Red List. 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.