Cow-nosed ray vs Koala

Rhinoptera steindachneri compared with Phascolarctos cinereus

Key Differences

• Cow-nosed ray is Near Threatened while Koala is Vulnerable.

Taxonomic Classification

Rank	Cow-nosed ray	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Elasmobranchii	Mammalia (Säugetiere)
Order	Myliobatiformes (Stechrochenartige)	Diprotodontia (Marsupials)
Family	Myliobatidae	Phascolarctidae (Koalas)
Genus	Rhinoptera	Phascolarctos (Koalas)
Species	Rhinoptera steindachneri	Phascolarctos cinereus

Evolutionary Relationship

Cow-nosed ray and Koala share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Cow-nosed ray

NT — Near Threatened

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Cow-nosed ray	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Cow-nosed ray

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Colombia. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.