Ballena azul vs Common Green Darner

Balaenoptera musculus compared with Anax junius

Key Differences

• Ballena azul is Vulnerable while Common Green Darner is Least Concern.

Taxonomic Classification

Rank	Ballena azul	Common Green Darner
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (cordados)	Arthropoda (artrópodos)
Class	Mammalia (mamíferos)	Insecta (insecto)
Order	Cetacea (Whales & Dolphins)	Odonata (Odonata)
Family	Balaenopteridae (Rorquals)	Aeshnidae
Genus	Balaenoptera (Rorquals)	Anax
Species	Balaenoptera musculus	Anax junius

Evolutionary Relationship

Ballena azul and Common Green Darner share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Ballena azul

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Common Green Darner

LC — Least Concern

Physical Characteristics

Attribute	Ballena azul	Common Green Darner
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

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.

Common Green Darner

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in United States.

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.

Common Green Darner

<em>Anax junius</em>, commonly known as the common green darner, is a large dragonfly belonging to the genus Anax within the family Aeshnidae. This species occupies virtually all terrestrial and freshwater habitats, and its range is centered on the United States, where it is one of the most recognizable and widespread dragonfly species. Common green darner is assessed as Least Concern on the IUCN Red List. The species is well known for undertaking long-distance migrations, with populations moving southward in autumn and northward in spring across North America. Adults are typically found near ponds, lakes, and slow-moving streams where females deposit eggs in aquatic vegetation. Biological traits of this species remain poorly documented in the scientific literature.