Irrawaddy dolphin vs Least Tern

Orcaella brevirostris compared with Sternula antillarum

Key Differences

• Irrawaddy dolphin is Endangered while Least Tern is Least Concern.

Taxonomic Classification

Rank	Irrawaddy dolphin	Least 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	Orcaella	Sternula
Species	Orcaella brevirostris	Sternula antillarum

Evolutionary Relationship

Irrawaddy dolphin and Least Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Irrawaddy dolphin

EN — Endangered

Least Tern

LC — Least Concern

Physical Characteristics

Attribute	Irrawaddy dolphin	Least Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Least Tern

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.