Ferruginous Duck vs Lesser Scaup

Aythya nyroca compared with Aythya affinis

Key Differences

• Ferruginous Duck is Not Evaluated while Lesser Scaup is Least Concern.

Taxonomic Classification

Rank	Ferruginous Duck	Lesser Scaup
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class same	Aves (chim)	Aves (chim)
Order same	Anseriformes (bộ Ngỗng)	Anseriformes (bộ Ngỗng)
Family same	Anatidae	Anatidae
Genus same	Aythya	Aythya
Species	Aythya nyroca	Aythya affinis

Evolutionary Relationship

Ferruginous Duck and Lesser Scaup share a common ancestor at the Genus level: Aythya.

Conservation Status

Ferruginous Duck

NE — Not Evaluated

Lesser Scaup

LC — Least Concern

Physical Characteristics

Attribute	Ferruginous Duck	Lesser Scaup
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ferruginous Duck

Habitat

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

Range

Found across Asia (Taiwan) and Europe (8 countries).

Lesser Scaup

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela).

Ferruginous Duck

Ferruginous Duck (Aythya nyroca) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.

Lesser Scaup

Lesser Scaup (Aythya affinis) 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.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇹🇼 Taiwan