Bilou or Siamang Kerdil Mentawai vs koala

Hylobates klossii compared with Phascolarctos cinereus

Key Differences

• Bilou or Siamang Kerdil Mentawai is Endangered while koala is Vulnerable.

Taxonomic Classification

Rank	Bilou or Siamang Kerdil Mentawai	koala
Kingdom same	Animalia (hewan)	Animalia (hewan)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (mamalia)	Mammalia (mamalia)
Order	Primates (Primata)	Diprotodontia (Marsupials)
Family	Hylobatidae	Phascolarctidae (Koalas)
Genus	Hylobates	Phascolarctos (Koalas)
Species	Hylobates klossii	Phascolarctos cinereus

Evolutionary Relationship

Bilou or Siamang Kerdil Mentawai and koala share a common ancestor at the Class level: Mammalia. (mamalia)

Conservation Status

Bilou or Siamang Kerdil Mentawai

EN — Endangered

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Bilou or Siamang Kerdil Mentawai	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Bilou or Siamang Kerdil Mentawai

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.