Buff-necked Ibis vs Red-billed Duck

Theristicus caudatus compared with Anas erythrorhyncha

Taxonomic Classification

Rank	Buff-necked Ibis	Red-billed Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Pelecaniformes (Pelecaniformes)	Anseriformes (Anseriformes)
Family	Threskiornithidae	Anatidae
Genus	Theristicus	Anas
Species	Theristicus caudatus	Anas erythrorhyncha

Evolutionary Relationship

Buff-necked Ibis and Red-billed Duck share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Buff-necked Ibis

LC — Least Concern

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Buff-necked Ibis	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Buff-necked Ibis

Habitat

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

Range

Found across Europe (5 countries) and South America (Colombia, Venezuela).

Red-billed Duck

Habitat

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

Range

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

Buff-necked Ibis

Buff-necked Ibis (Theristicus caudatus) 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.

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.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇬🇧 United Kingdom