Blue Dolphin vs Chatham shag

Stenella coeruleoalba compared with Leucocarbo onslowi

Key Differences

• Blue Dolphin is Least Concern while Chatham shag is Critically Endangered.

Taxonomic Classification

Rank	Blue Dolphin	Chatham shag
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Suliformes (Suliformes)
Family	Delphinidae (Oceanic Dolphins)	Phalacrocoracidae
Genus	Stenella	Leucocarbo
Species	Stenella coeruleoalba	Leucocarbo onslowi

Evolutionary Relationship

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

Conservation Status

Blue Dolphin

LC — Least Concern

Chatham shag

CR — Critically Endangered

Physical Characteristics

Attribute	Blue Dolphin	Chatham shag
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).

Chatham shag

Habitat

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

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.

Chatham shag

The Chatham shag (Leucocarbo onslowi) is a species in the genus Leucocarbo. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.