koala vs イワシクジラ (Iwashi Kujira)

Phascolarctos cinereus compared with Balaenoptera borealis

Key Differences

• koala is Vulnerable while イワシクジラ (Iwashi Kujira) is Endangered.

Taxonomic Classification

Rank	koala	イワシクジラ (Iwashi Kujira)
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Diprotodontia (カンガルー目)	Cetacea (Whales & Dolphins)
Family	Phascolarctidae (Koalas)	Balaenopteridae (Rorquals)
Genus	Phascolarctos (Koalas)	Balaenoptera (Rorquals)
Species	Phascolarctos cinereus	Balaenoptera borealis

Evolutionary Relationship

koala and イワシクジラ (Iwashi Kujira) share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

イワシクジラ (Iwashi Kujira)

EN — Endangered

Physical Characteristics

Attribute	koala	イワシクジラ (Iwashi Kujira)
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.

イワシクジラ (Iwashi Kujira)

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

koala

オーストラリア東部・南東部を代表する有袋類で、体重は最大15kgに達し、低カロリーのユーカリの葉食から得るエネルギーを節約するために1日最大22時間を睡眠に費やす。他の哺乳類の多くを死に至らしめる有毒なユーカリ成分を処理するために高度に特化しており、解毒に特別に適応した腸内微生物叢を持つ。クラミジア感染症、生息地の伐採、気候変動により個体数が激減し、2022年に絶滅危惧種に指定された。