Gray-bellied Night Monkey vs Yellow-billed Tern

Aotus lemurinus compared with Sternula superciliaris

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Yellow-billed Tern is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Yellow-billed Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Primates (Primates)	Charadriiformes (Charadriiformes)
Family	Aotidae	Laridae
Genus	Aotus	Sternula
Species	Aotus lemurinus	Sternula superciliaris

Evolutionary Relationship

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

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Yellow-billed Tern

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Yellow-billed Tern
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.

Yellow-billed Tern

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