Gray-bellied Night Monkey vs Nilgiri langur

Aotus lemurinus compared with Semnopithecus johnii

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Nilgiri langur
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Primates (Primates)	Primates (Primates)
Family	Aotidae	Cercopithecidae (Old World Monkeys)
Genus	Aotus	Semnopithecus
Species	Aotus lemurinus	Semnopithecus johnii

Evolutionary Relationship

Gray-bellied Night Monkey and Nilgiri langur share a common ancestor at the Order level: Primates. (Primates)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Nilgiri langur

VU — Vulnerable

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Nilgiri langur
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.

Nilgiri langur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.