Bitter Oleander vs Blauwal

Holarrhena pubescens compared with Balaenoptera musculus

Key Differences

Bitter Oleander is Least Concern while Blauwal is Vulnerable.

Taxonomic Classification

Rank	Bitter Oleander	Blauwal
Kingdom	Plantae (Pflanzen)	Animalia (Tier)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordatiere)
Class	Magnoliopsida (Dicots)	Mammalia (Säugetiere)
Order	Gentianales (Enzianartige)	Cetacea (Whales & Dolphins)
Family	Apocynaceae	Balaenopteridae (Rorquals)
Genus	Holarrhena	Balaenoptera (Rorquals)
Species	Holarrhena pubescens	Balaenoptera musculus

Conservation Status

Bitter Oleander

LC — Least Concern

Blauwal

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	Bitter Oleander	Blauwal
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

Bitter Oleander

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Taiwan.

Blauwal

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.

Bitter Oleander

The Bitter Oleander (Holarrhena pubescens) is a species in the genus Holarrhena. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Blauwal

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.