Bighead spurdog vs koala

Squalus bucephalus compared with Phascolarctos cinereus

Key Differences

• Bighead spurdog is Data Deficient while koala is Vulnerable.

Taxonomic Classification

Rank	Bighead spurdog	koala
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Elasmobranchii	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Squaliformes (อันดับปลาฉลามหลังหนาม)	Diprotodontia (Marsupials)
Family	Squalidae	Phascolarctidae (Koalas)
Genus	Squalus	Phascolarctos (Koalas)
Species	Squalus bucephalus	Phascolarctos cinereus

Evolutionary Relationship

Bighead spurdog and koala share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Bighead spurdog

DD — Data Deficient

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Bighead spurdog	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Bighead spurdog

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.

Bighead spurdog

The Bighead spurdog (Squalus bucephalus) is a species in the genus Squalus.

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.