Irrawaddy dolphin vs Polynesian rat

Orcaella brevirostris compared with Rattus exulans

Key Differences

• Irrawaddy dolphin is Endangered while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	Irrawaddy dolphin	Polynesian rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Cetacea (Whales & Dolphins)	Rodentia (Rodents)
Family	Delphinidae (Oceanic Dolphins)	Muridae (Mice & Rats)
Genus	Orcaella	Rattus
Species	Orcaella brevirostris	Rattus exulans

Evolutionary Relationship

Irrawaddy dolphin and Polynesian rat share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Irrawaddy dolphin

EN — Endangered

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	Irrawaddy dolphin	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Polynesian rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical coniferous forests, among 4 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (6 countries), Europe (United Kingdom), North America (United States), Oceania and the Pacific (11 countries), and South America (Chile).