Irrawaddy dolphin vs Lesser Crested Tern

Orcaella brevirostris compared with Thalasseus bengalensis

Key Differences

• Irrawaddy dolphin is Endangered while Lesser Crested Tern is Not Evaluated.

Taxonomic Classification

Rank	Irrawaddy dolphin	Lesser Crested 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 bengalensis

Evolutionary Relationship

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

Conservation Status

Irrawaddy dolphin

EN — Endangered

Lesser Crested Tern

NE — Not Evaluated

Physical Characteristics

Attribute	Irrawaddy dolphin	Lesser Crested Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Lesser Crested Tern

Habitat

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

Range

Distributed across Norway and Sweden.