Annamese Langur vs common squirrel monkey

Trachypithecus margarita compared with Saimiri sciureus

Key Differences

• Annamese Langur is Endangered while common squirrel monkey is Least Concern.

Taxonomic Classification

Rank	Annamese Langur	common squirrel monkey
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum same	Chordata (Kordalılar)	Chordata (Kordalılar)
Class same	Mammalia (memeliler)	Mammalia (memeliler)
Order same	Primates (Primat)	Primates (Primat)
Family	Cercopithecidae (Old World Monkeys)	Cebidae
Genus	Trachypithecus	Saimiri
Species	Trachypithecus margarita	Saimiri sciureus

Evolutionary Relationship

Annamese Langur and common squirrel monkey share a common ancestor at the Order level: Primates. (Primat)

Conservation Status

Annamese Langur

EN — Endangered

common squirrel monkey

LC — Least Concern

Physical Characteristics

Attribute	Annamese Langur	common squirrel monkey
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Annamese Langur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

common squirrel monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Brazil, Colombia, Japan, and Venezuela.

Annamese Langur

The Annamese Langur (Trachypithecus margarita) is a species in the genus Trachypithecus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

common squirrel monkey

<em>Saimiri sciureus</em>, commonly known as the common squirrel monkey, is a small New World monkey in the family Cebidae, widely distributed across the tropical forests of South America. This species typically inhabits lowland tropical rainforests, riverine forests, secondary forests, and forest edges from sea level to approximately 2,000 metres elevation, showing a preference for lower forest strata and forest margins. Its geographic range spans the Amazon Basin, extending through Brazil, Peru, Colombia, Venezuela, Guyana, Bolivia, and adjacent countries. Classified as Least Concern on the IUCN Red List, <em>Saimiri sciureus</em> is among the most abundant primates across much of Amazonia, though local populations face pressures from deforestation and the pet trade. The species is highly social, typically forming troops of 10–75 individuals that forage actively during daylight hours. It is omnivorous, typically feeding on insects, fruit, nectar, small vertebrates, and bird eggs, with insects comprising a major proportion of the diet. Adults typically reach a body length of approximately 25–37 cm with a tail length of 37–47 cm, and body weight typically ranges from approximately 600–1,100 g. Average lifespan in the wild is typically around 15–20 years.