Delfín de Commerson vs Lesser Golden-bellied Rice Rat

Cephalorhynchus commersonii compared with Nephelomys nimbosus

Key Differences

• Delfín de Commerson is Least Concern while Lesser Golden-bellied Rice Rat is Vulnerable.

Taxonomic Classification

Rank	Delfín de Commerson	Lesser Golden-bellied Rice Rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Cetacea (Whales & Dolphins)	Rodentia (Rodents)
Family	Delphinidae (Oceanic Dolphins)	Cricetidae
Genus	Cephalorhynchus	Nephelomys
Species	Cephalorhynchus commersonii	Nephelomys nimbosus

Evolutionary Relationship

Delfín de Commerson and Lesser Golden-bellied Rice Rat share a common ancestor at the Class level: Mammalia. (mamíferos)

Conservation Status

Delfín de Commerson

LC — Least Concern

Lesser Golden-bellied Rice Rat

VU — Vulnerable

Physical Characteristics

Attribute	Delfín de Commerson	Lesser Golden-bellied Rice Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Delfín de Commerson

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Lesser Golden-bellied Rice Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Ecuador. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Delfín de Commerson

<em>Cephalorhynchus commersonii</em>, commonly known as Commerson's Dolphin, is a small cetacean in the family Delphinidae. This species is classified as Least Concern on the IUCN Red List and is notable for its striking black-and-white coloration, which makes it one of the most visually distinctive dolphin species. Commerson's Dolphins typically inhabit coastal and nearshore marine environments of the Southern Hemisphere, particularly around the Falkland Islands, the southern tip of South America, and a geographically isolated population near the Kerguelen Islands in the Indian Ocean. These dolphins are highly social animals, often observed in small groups engaging in acrobatic behaviors near the surface. They typically feed on fish, squid, and crustaceans, often hunting cooperatively in shallow waters and kelp beds. Their average lifespan is approximately 18 years, and they are known for their fast, energetic swimming. Commerson's Dolphins are sometimes caught as bycatch in fishing nets, posing a localized conservation concern despite their overall Least Concern status.