Gray-bellied Night Monkey vs Square-tailed Nightjar

Aotus lemurinus compared with Caprimulgus fossii

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Square-tailed Nightjar is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Square-tailed Nightjar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Primates (Primates)	Caprimulgiformes (Caprimulgiformes)
Family	Aotidae	Caprimulgidae
Genus	Aotus	Caprimulgus
Species	Aotus lemurinus	Caprimulgus fossii

Evolutionary Relationship

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

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Square-tailed Nightjar

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Square-tailed Nightjar
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.

Square-tailed Nightjar

Habitat

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

Range

Found in Norway.