Irrawaddy dolphin vs Surprise Thorius

Orcaella brevirostris compared with Thorius insperatus

Key Differences

• Irrawaddy dolphin is Endangered while Surprise Thorius is Critically Endangered.

Taxonomic Classification

Rank	Irrawaddy dolphin	Surprise Thorius
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Cetacea (Whales & Dolphins)	Caudata (Caudata)
Family	Delphinidae (Oceanic Dolphins)	Plethodontidae
Genus	Orcaella	Thorius
Species	Orcaella brevirostris	Thorius insperatus

Evolutionary Relationship

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

Conservation Status

Irrawaddy dolphin

EN — Endangered

Surprise Thorius

CR — Critically Endangered

Physical Characteristics

Attribute	Irrawaddy dolphin	Surprise Thorius
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Surprise Thorius

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Mexico. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.