Gray-bellied Night Monkey vs Rainforest Brown

Aotus lemurinus compared with Cassionympha cassius

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Rainforest Brown is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Rainforest Brown
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Primates (Primates)	Lepidoptera (Butterflies & Moths)
Family	Aotidae	Nymphalidae (Brush-footed Butterflies)
Genus	Aotus	Cassionympha
Species	Aotus lemurinus	Cassionympha cassius

Evolutionary Relationship

Gray-bellied Night Monkey and Rainforest Brown share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Rainforest Brown

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Rainforest Brown
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.

Rainforest Brown

Habitat

Typically found in virtually all terrestrial and freshwater habitats.