Black-headed Night Monkey vs European otter

Aotus nigriceps compared with Lutra lutra

Key Differences

• Black-headed Night Monkey is Least Concern while European otter is Vulnerable.

Taxonomic Classification

Rank	Black-headed Night Monkey	European otter
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Mammalia (млекопитающие)	Mammalia (млекопитающие)
Order	Primates (приматы)	Carnivora (хищные)
Family	Aotidae	Mustelidae (Weasels & Otters)
Genus	Aotus	Lutra (Otters)
Species	Aotus nigriceps	Lutra lutra

Evolutionary Relationship

Black-headed Night Monkey and European otter share a common ancestor at the Class level: Mammalia. (млекопитающие)

Conservation Status

Black-headed Night Monkey

LC — Least Concern

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Black-headed Night Monkey	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Black-headed Night Monkey

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.

Black-headed Night Monkey

The Black-headed Night Monkey (Aotus nigriceps) is a species in the genus Aotus. It is currently classified as Least Concern 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.