Mariana Crow vs Red-billed Duck

Corvus kubaryi compared with Anas erythrorhyncha

Key Differences

• Mariana Crow is Critically Endangered while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Mariana Crow	Red-billed Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Passeriformes (Songbirds)	Anseriformes (Anseriformes)
Family	Corvidae (Crows & Ravens)	Anatidae
Genus	Corvus (Crows & Ravens)	Anas
Species	Corvus kubaryi	Anas erythrorhyncha

Evolutionary Relationship

Mariana Crow and Red-billed Duck share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Mariana Crow

CR — Critically Endangered

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Mariana Crow	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Mariana Crow

Habitat

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

Range

Found in Norway. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway