Gray-bellied Night Monkey vs koala

Aotus lemurinus compared with Phascolarctos cinereus

Taxonomic Classification

Rank	Gray-bellied Night Monkey	koala
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class same	Mammalia (lớp Thú)	Mammalia (lớp Thú)
Order	Primates (bộ Linh trưởng)	Diprotodontia (Thú hai răng trước)
Family	Aotidae	Phascolarctidae (Koalas)
Genus	Aotus	Phascolarctos (Koalas)
Species	Aotus lemurinus	Phascolarctos cinereus

Evolutionary Relationship

Gray-bellied Night Monkey and koala share a common ancestor at the Class level: Mammalia. (lớp Thú)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Gray-bellied Night Monkey	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Gray-bellied Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

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

koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.