Оклендский крохаль vs Большой крохаль

Mergus australis compared with Mergus merganser

Key Differences

• Оклендский крохаль is Extinct while Большой крохаль is Least Concern.

Taxonomic Classification

Rank	Оклендский крохаль	Большой крохаль
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Aves (птицы)	Aves (птицы)
Order same	Anseriformes (гусеобразные)	Anseriformes (гусеобразные)
Family same	Anatidae	Anatidae
Genus same	Mergus	Mergus
Species	Mergus australis	Mergus merganser

Evolutionary Relationship

Оклендский крохаль and Большой крохаль share a common ancestor at the Genus level: Mergus.

Conservation Status

Оклендский крохаль

EX — Extinct

Большой крохаль

LC — Least Concern

Physical Characteristics

Attribute	Оклендский крохаль	Большой крохаль
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Оклендский крохаль

Habitat

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

Range

Found in Norway.

Большой крохаль

Habitat

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

Range

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

Оклендский крохаль

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.

Большой крохаль

<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