Irrawaddy dolphin vs Sandwich Tern

Orcaella brevirostris compared with Thalasseus sandvicensis

Key Differences

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

Taxonomic Classification

Rank	Irrawaddy dolphin	Sandwich 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	Thalasseus
Species	Orcaella brevirostris	Thalasseus sandvicensis

Evolutionary Relationship

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

Conservation Status

Irrawaddy dolphin

EN — Endangered

Sandwich Tern

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Sandwich Tern

Habitat

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

Range

Found across Europe (4 countries) and South America (Colombia, Ecuador, Venezuela).

Sandwich Tern

Sandwich Tern (Thalasseus sandvicensis) 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.