Azara's Broad-headed Oryzomys vs blue whale

Hylaeamys megacephalus compared with Balaenoptera musculus

Key Differences

• Azara's Broad-headed Oryzomys is Least Concern while blue whale is Vulnerable.

Taxonomic Classification

Rank	Azara's Broad-headed Oryzomys	blue whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Rodentia (Rodents)	Cetacea (Whales & Dolphins)
Family	Cricetidae	Balaenopteridae (Rorquals)
Genus	Hylaeamys	Balaenoptera (Rorquals)
Species	Hylaeamys megacephalus	Balaenoptera musculus

Evolutionary Relationship

Azara's Broad-headed Oryzomys and blue whale share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Azara's Broad-headed Oryzomys

LC — Least Concern

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	Azara's Broad-headed Oryzomys	blue whale
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

Azara's Broad-headed Oryzomys

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Venezuela.

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.

Azara's Broad-headed Oryzomys

The Azara's Broad-headed Oryzomys (Hylaeamys megacephalus) is a species in the genus Hylaeamys. It is currently classified as Least Concern 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.