Haviside s Dolphin vs Ring-necked Duck

Cephalorhynchus heavisidii compared with Aythya collaris

Key Differences

• Haviside s Dolphin is Near Threatened while Ring-necked Duck is Least Concern.

Taxonomic Classification

Rank	Haviside s Dolphin	Ring-necked Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Anseriformes (Anseriformes)
Family	Delphinidae (Oceanic Dolphins)	Anatidae
Genus	Cephalorhynchus	Aythya
Species	Cephalorhynchus heavisidii	Aythya collaris

Evolutionary Relationship

Haviside s Dolphin and Ring-necked Duck share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Haviside s Dolphin

NT — Near Threatened

Ring-necked Duck

LC — Least Concern

Physical Characteristics

Attribute	Haviside s Dolphin	Ring-necked Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Haviside s Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Ring-necked Duck

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela).

Ring-necked Duck

Ring-necked Duck (Aythya collaris) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.