Big Finner vs Ferruginous Duck

Balaenoptera physalus compared with Aythya nyroca

Key Differences

Big Finner is Endangered while Ferruginous Duck is Not Evaluated.

Taxonomic Classification

Rank	Big Finner	Ferruginous 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	Balaenopteridae (Rorquals)	Anatidae
Genus	Balaenoptera (Rorquals)	Aythya
Species	Balaenoptera physalus	Aythya nyroca

Evolutionary Relationship

Big Finner and Ferruginous Duck share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Big Finner

EN — Endangered

Ferruginous Duck

NE — Not Evaluated

Physical Characteristics

Attribute	Big Finner	Ferruginous Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Ferruginous Duck

Habitat

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

Range

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

Big Finner

Big Finner (Balaenoptera physalus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

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.