Big-eared Hopping Mouse vs Collins' Squirrel Monkey

Notomys macrotis compared with Saimiri collinsi

Key Differences

• Big-eared Hopping Mouse is Extinct while Collins' Squirrel Monkey is Least Concern.

Taxonomic Classification

Rank	Big-eared Hopping Mouse	Collins' Squirrel Monkey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Primates (Primates)
Family	Muridae (Mice & Rats)	Cebidae
Genus	Notomys	Saimiri
Species	Notomys macrotis	Saimiri collinsi

Evolutionary Relationship

Big-eared Hopping Mouse and Collins' Squirrel Monkey share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Big-eared Hopping Mouse

EX — Extinct

Collins' Squirrel Monkey

LC — Least Concern

Physical Characteristics

Attribute	Big-eared Hopping Mouse	Collins' Squirrel Monkey
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big-eared Hopping Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Collins' Squirrel Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Big-eared Hopping Mouse

The Big-eared Hopping Mouse (Notomys macrotis) is a species in the genus Notomys. It is currently classified as Extinct on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Collins' Squirrel Monkey

<em>Saimiri collinsi</em>, commonly known as Collins' Squirrel Monkey, is a primate species belonging to the genus <em>Saimiri</em> within the family Cebidae. Squirrel monkeys are small, highly social New World primates known for their agility in forest canopies and their complex group dynamics. This species is assessed as Least Concern by major conservation bodies, indicating that its populations are not currently considered at high risk of decline, though ongoing deforestation and habitat fragmentation in Amazonian regions may affect future population stability. Collins' Squirrel Monkey inhabits diverse terrestrial and aquatic-adjacent environments typical of tropical forest ecosystems in South America. Specific country-level distributional records are not detailed in current documentation. Dietary information specific to this species has not been recorded, though squirrel monkeys in general are omnivorous, consuming insects, small vertebrates, fruits, and other plant material. Biological traits of this species remain poorly documented in the scientific literature. Research into the taxonomy and ecology of <em>Saimiri collinsi</em> continues to refine understanding of squirrel monkey diversity.