Black-headed Night Monkey vs Elm Leech

Aotus nigriceps compared with Hypsizygus ulmarius

Key Differences

• Black-headed Night Monkey is Least Concern while Elm Leech is Critically Endangered.

Taxonomic Classification

Rank	Black-headed Night Monkey	Elm Leech
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Mammalia (Mammals)	Agaricomycetes (Mushrooms)
Order	Primates (Primates)	Agaricales (Gilled Mushrooms)
Family	Aotidae	Lyophyllaceae
Genus	Aotus	Hypsizygus
Species	Aotus nigriceps	Hypsizygus ulmarius

Conservation Status

Black-headed Night Monkey

LC — Least Concern

Elm Leech

CR — Critically Endangered

Physical Characteristics

Attribute	Black-headed Night Monkey	Elm Leech
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-headed Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Elm Leech

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Indomalayan biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and North America (United States). Currently classified as Critically 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.