black-shanked douc vs blue whale

Pygathrix nigripes compared with Balaenoptera musculus

Key Differences

• black-shanked douc is Critically Endangered while blue whale is Vulnerable.

Taxonomic Classification

Rank	black-shanked douc	blue whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Primates (Primates)	Cetacea (Whales & Dolphins)
Family	Cercopithecidae (Old World Monkeys)	Balaenopteridae (Rorquals)
Genus	Pygathrix	Balaenoptera (Rorquals)
Species	Pygathrix nigripes	Balaenoptera musculus

Evolutionary Relationship

black-shanked douc and blue whale share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

black-shanked douc

CR — Critically Endangered

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	black-shanked douc	blue whale
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

black-shanked douc

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

blue whale

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

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

black-shanked douc

The Black-shanked douc (Pygathrix nigripes) is a species in the genus Pygathrix. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

blue whale

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.