Gray-bellied Night Monkey vs Lesser Siren

Aotus lemurinus compared with Siren intermedia

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Lesser Siren is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Lesser Siren
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Primates (Primates)	Caudata (Caudata)
Family	Aotidae	Sirenidae
Genus	Aotus	Siren
Species	Aotus lemurinus	Siren intermedia

Evolutionary Relationship

Gray-bellied Night Monkey and Lesser Siren share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Lesser Siren

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Lesser Siren
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Gray-bellied Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Lesser Siren

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Distributed across Belgium and Mexico.