Black-headed Night Monkey vs Scarlet Macaw

Aotus nigriceps compared with Ara macao

Taxonomic Classification

Rank	Black-headed Night Monkey	Scarlet Macaw
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Primates (Primates)	Psittaciformes (Parrots)
Family	Aotidae	Psittacidae (True Parrots)
Genus	Aotus	Ara (Macaws)
Species	Aotus nigriceps	Ara macao

Evolutionary Relationship

Black-headed Night Monkey and Scarlet Macaw share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-headed Night Monkey

LC — Least Concern

Scarlet Macaw

LC — Least Concern

Population: ~50.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Black-headed Night Monkey	Scarlet Macaw
Diet	—	Herbivore
Average Lifespan	—	50 years
Average Length	—	85 cm
Average Weight	—	1.0 kg

Habitat & Geographic Range

Black-headed Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Scarlet Macaw

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found across Europe (5 countries) and South America (Colombia, Ecuador, Venezuela). Population trends indicate a declining trajectory in parts of its range.

Black-headed Night Monkey

The Black-headed Night Monkey (Aotus nigriceps) is a species in the genus Aotus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Scarlet Macaw

One of the most brilliantly colored birds in the Americas, scarlet macaws display vivid red, yellow, and blue plumage with wingspans reaching 1 meter. Found in humid lowland forests from Mexico to Bolivia, they are highly intelligent, long-lived — up to 75 years — and form lifelong pair bonds. They travel long distances to clay licks where they consume mineral-rich soil to detoxify seeds. Listed as Least Concern but locally threatened by habitat loss and the pet trade.