Commerson s Dolphin vs King/Common Eider

Cephalorhynchus commersonii compared with Somateria spectabilis

Key Differences

• Commerson s Dolphin is Least Concern while King/Common Eider is Not Evaluated.

Taxonomic Classification

Rank	Commerson s Dolphin	King/Common Eider
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Mammalia (lớp Thú)	Aves (chim)
Order	Cetacea (Whales & Dolphins)	Anseriformes (bộ Ngỗng)
Family	Delphinidae (Oceanic Dolphins)	Anatidae
Genus	Cephalorhynchus	Somateria
Species	Cephalorhynchus commersonii	Somateria spectabilis

Evolutionary Relationship

Commerson s Dolphin and King/Common Eider share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

Commerson s Dolphin

LC — Least Concern

King/Common Eider

NE — Not Evaluated

Physical Characteristics

Attribute	Commerson s Dolphin	King/Common Eider
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Commerson s Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

King/Common Eider

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Commerson s Dolphin

<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.