Gray-bellied Night Monkey vs Grayish Mourner

Aotus lemurinus compared with Rhytipterna simplex

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Grayish Mourner is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Grayish Mourner
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Primates (Primates)	Passeriformes (Songbirds)
Family	Aotidae	Tyrannidae
Genus	Aotus	Rhytipterna
Species	Aotus lemurinus	Rhytipterna simplex

Evolutionary Relationship

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

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Grayish Mourner

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Grayish Mourner
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.

Grayish Mourner

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Shared Countries

Both species can be found in 3 countries:

🇨🇴 Colombia 🇪🇨 Ecuador 🇻🇪 Venezuela