Abert's Squirrel vs Coimbra-Filho’s Titi

Sciurus aberti compared with Callicebus coimbrai

Key Differences

• Abert's Squirrel is Least Concern while Coimbra-Filho’s Titi is Endangered.

Taxonomic Classification

Rank	Abert's Squirrel	Coimbra-Filho’s Titi
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Rodentia (ネズミ目)	Primates (サル目)
Family	Sciuridae (Squirrels)	Pitheciidae
Genus	Sciurus (Tree Squirrels)	Callicebus
Species	Sciurus aberti	Callicebus coimbrai

Evolutionary Relationship

Abert's Squirrel and Coimbra-Filho’s Titi share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Abert's Squirrel

LC — Least Concern

Coimbra-Filho’s Titi

EN — Endangered

Physical Characteristics

Attribute	Abert's Squirrel	Coimbra-Filho’s Titi
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Abert's Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Coimbra-Filho’s Titi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Abert's Squirrel

The Abert's Squirrel (Sciurus aberti) is a species in the genus Sciurus. It is currently classified as Least Concern on the IUCN Red List. It typically inhabits 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.