Brumback's Night Monkey vs Coimbra-Filho’s Titi

Aotus brumbacki compared with Callicebus coimbrai

Key Differences

• Brumback's Night Monkey is Vulnerable while Coimbra-Filho’s Titi is Endangered.

Taxonomic Classification

Rank	Brumback's Night Monkey	Coimbra-Filho’s Titi
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order same	Primates (灵长目)	Primates (灵长目)
Family	Aotidae	Pitheciidae
Genus	Aotus	Callicebus
Species	Aotus brumbacki	Callicebus coimbrai

Evolutionary Relationship

Brumback's Night Monkey and Coimbra-Filho’s Titi share a common ancestor at the Order level: Primates. (灵长目)

Conservation Status

Brumback's Night Monkey

VU — Vulnerable

Coimbra-Filho’s Titi

EN — Endangered

Physical Characteristics

Attribute	Brumback's Night Monkey	Coimbra-Filho’s Titi
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brumback's Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Coimbra-Filho’s Titi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Brumback's Night Monkey

The Brumback's Night Monkey (Aotus brumbacki) is a species in the genus Aotus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Coimbra-Filho’s Titi

The Coimbra-Filho's Titi (Callicebus coimbrai), also known as Coimbra-Filho's Titi Monkey, is a small New World monkey in the family Pitheciidae, named in honour of the Brazilian primatologist Adelmar F. Coimbra-Filho. This titi monkey is endemic to the Atlantic Forest of northeastern Brazil, with its range restricted to the states of Sergipe and southern Alagoas—one of the most critically fragmented and threatened biomes on Earth. Adults are small, with reddish-brown fur on the flanks and upperparts, pale grey on the underparts, and an orange-red forehead band. Like all titi monkeys, Callicebus coimbrai is highly social, living in monogamous family groups of 2–5 individuals that engage in elaborate dawn duets and tail-twining behaviour as expressions of pair bonding. The species inhabits Atlantic Forest fragments, including lowland and highland forest patches, riverine gallery forest, and secondary growth, where it subsists on fruits, seeds, leaves, and occasional invertebrates. The Coimbra-Filho's Titi is classified as Endangered by the IUCN due to its severely fragmented range within one of the world's most deforested biomes, with less than 12% of original Atlantic Forest remaining, ongoing habitat loss from agricultural expansion, and small, isolated population sizes highly vulnerable to stochastic extinction events.