Fatspine spurdog vs Red-billed Duck

Squalus crassispinus compared with Anas erythrorhyncha

Taxonomic Classification

Rank	Fatspine spurdog	Red-billed Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Aves (Birds)
Order	Squaliformes (Squaliformes)	Anseriformes (Anseriformes)
Family	Squalidae	Anatidae
Genus	Squalus	Anas
Species	Squalus crassispinus	Anas erythrorhyncha

Evolutionary Relationship

Fatspine spurdog and Red-billed Duck share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Fatspine spurdog

LC — Least Concern

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Fatspine spurdog	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Fatspine spurdog

Red-billed Duck

Habitat

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

Range

Found across Europe (6 countries) and South America (Ecuador).

Red-billed Duck

Red-billed Duck (Anas erythrorhyncha) 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.