Irrawaddy dolphin vs Pacific Spiny-rat

Orcaella brevirostris compared with Proechimys decumanus

Key Differences

• Irrawaddy dolphin is Endangered while Pacific Spiny-rat is Near Threatened.

Taxonomic Classification

Rank	Irrawaddy dolphin	Pacific Spiny-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)	Echimyidae
Genus	Orcaella	Proechimys
Species	Orcaella brevirostris	Proechimys decumanus

Evolutionary Relationship

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

Conservation Status

Irrawaddy dolphin

EN — Endangered

Pacific Spiny-rat

NT — Near Threatened

Physical Characteristics

Attribute	Irrawaddy dolphin	Pacific Spiny-rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Pacific Spiny-rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.