koala vs sika deer

Phascolarctos cinereus compared with Cervus nippon

Key Differences

koala is Vulnerable while sika deer is Not Evaluated.

Taxonomic Classification

Rank	koala	sika deer
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	Diprotodontia (Thú hai răng trước)	Artiodactyla (Bộ Guốc chẵn)
Family	Phascolarctidae (Koalas)	Cervidae (Deer)
Genus	Phascolarctos (Koalas)	Cervus (True Deer)
Species	Phascolarctos cinereus	Cervus nippon

Evolutionary Relationship

koala and sika deer share a common ancestor at the Class level: Mammalia. (lớp Thú)

Xem Class: Mammalia

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

sika deer

NE — Not Evaluated

Physical Characteristics

Attribute	koala	sika deer
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	75 cm	—
Average Weight	10.0 kg	—

Habitat & Geographic 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.

sika deer

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Africa (South Africa), Asia (Azerbaijan, Japan, Vietnam), Europe (22 countries), North America (United States), and Oceania and the Pacific (New Zealand).

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.

sika deer

sika deer (Cervus nippon) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.