Blue Dolphin vs Elegant Tern

Stenella coeruleoalba compared with Thalasseus elegans

Key Differences

• Blue Dolphin is Least Concern while Elegant Tern is Near Threatened.

Taxonomic Classification

Rank	Blue Dolphin	Elegant Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Charadriiformes (Charadriiformes)
Family	Delphinidae (Oceanic Dolphins)	Laridae
Genus	Stenella	Thalasseus
Species	Stenella coeruleoalba	Thalasseus elegans

Evolutionary Relationship

Blue Dolphin and Elegant Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Blue Dolphin

LC — Least Concern

Elegant Tern

NT — Near Threatened

Physical Characteristics

Attribute	Blue Dolphin	Elegant Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela).

Elegant Tern

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Belgium, Colombia, Denmark, Ecuador, and Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Blue Dolphin

Blue Dolphin (Stenella coeruleoalba) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇨🇴 Colombia 🇩🇰 Denmark 🇪🇨 Ecuador 🇳🇴 Norway