Black-headed Night Monkey vs Ray's Knotgrass

Aotus nigriceps compared with Polygonum oxyspermum

Key Differences

• Black-headed Night Monkey is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	Black-headed Night Monkey	Ray's Knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Primates (Primates)	Caryophyllales (Caryophyllales)
Family	Aotidae	Polygonaceae
Genus	Aotus	Polygonum
Species	Aotus nigriceps	Polygonum oxyspermum

Conservation Status

Black-headed Night Monkey

LC — Least Concern

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	Black-headed Night Monkey	Ray's Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-headed Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Ray's Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across 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.