Gray-bellied Night Monkey vs Sumatran surili

Aotus lemurinus compared with Presbytis melalophos

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Sumatran surili is Endangered.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Sumatran surili
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	Presbytis
Species	Aotus lemurinus	Presbytis melalophos

Evolutionary Relationship

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

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Sumatran surili

EN — Endangered

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Sumatran surili
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.

Sumatran surili

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.