Auckland Islands Merganser vs Common Merganser

Mergus australis compared with Mergus merganser

Key Differences

• Auckland Islands Merganser is Extinct while Common Merganser is Least Concern.

Taxonomic Classification

Rank	Auckland Islands Merganser	Common Merganser
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order same	Anseriformes (Anseriformes)	Anseriformes (Anseriformes)
Family same	Anatidae	Anatidae
Genus same	Mergus	Mergus
Species	Mergus australis	Mergus merganser

Evolutionary Relationship

Auckland Islands Merganser and Common Merganser share a common ancestor at the Genus level: Mergus.

Conservation Status

Auckland Islands Merganser

EX — Extinct

Common Merganser

LC — Least Concern

Physical Characteristics

Attribute	Auckland Islands Merganser	Common Merganser
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Auckland Islands Merganser

Habitat

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

Range

Found in Norway.

Common Merganser

Habitat

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

Range

Found across Europe (5 countries) and North America (United States).

Auckland Islands Merganser

The Auckland Islands Merganser (Mergus australis) is a species in the genus Mergus. It is currently classified as Extinct on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

Common Merganser

<em>Mergus merganser</em>, the common merganser or goosander, is a large diving duck in the family Anatidae, broadly distributed across Europe and North America. It is classified as Least Concern on the IUCN Red List. This species is capable of aerial, terrestrial, and aquatic locomotion, but is most specialized for underwater pursuit of prey. The common merganser is typically piscivorous, diving in clear, fast-flowing rivers and lakes to catch fish using its serrated bill, which provides a firm grip on slippery prey. Males display striking breeding plumage with a dark green head, white body, and red bill, while females are grey with a rusty-brown head and crested nape. The species nests in tree cavities, cliff ledges, and artificial nest boxes near freshwater habitats. It requires clean, well-oxygenated rivers and lakes for foraging, making it sensitive to water quality degradation and overfishing of prey species. Common mergansers are migratory in northern parts of their range, moving to coastal and ice-free inland waters during winter months.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway