Cuatro Ojos vs Ballena azul

Aotus nigriceps compared with Balaenoptera musculus

Key Differences

Cuatro Ojos is Least Concern while Ballena azul is Vulnerable.

Taxonomic Classification

Rank	Cuatro Ojos	Ballena azul
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Primates (Primates)	Cetacea (Whales & Dolphins)
Family	Aotidae	Balaenopteridae (Rorquals)
Genus	Aotus	Balaenoptera (Rorquals)
Species	Aotus nigriceps	Balaenoptera musculus

Evolutionary Relationship

Cuatro Ojos and Ballena azul share a common ancestor at the Class level: Mammalia. (mamíferos)

Vista Class: Mammalia

Conservation Status

Cuatro Ojos

LC — Least Concern

Ballena azul

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	Cuatro Ojos	Ballena azul
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

Cuatro Ojos

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Ballena azul

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.

Cuatro Ojos

The Black-headed Night Monkey (Aotus nigriceps) is a species in the genus Aotus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Ballena azul

El animal más grande que se conoce haya vivido en la Tierra; las ballenas azules pueden alcanzar 33 metros y 200 toneladas — sus corazones solos pesan tanto como un automóvil pequeño. Se encuentran en todos los océanos y migran entre las zonas de alimentación polares y las áreas de reproducción tropicales. Son filtradoras que consumen hasta 4 toneladas de kril al día. En peligro de extinción, con poblaciones globales estimadas entre 10.000 y 25.000 tras casi extinguirse por la caza de ballenas en el siglo XX.