Red-billed Duck vs Rock Foam

Anas erythrorhyncha compared with Stereocaulon saxatile

Key Differences

• Red-billed Duck is Least Concern while Rock Foam is Near Threatened.

Taxonomic Classification

Rank	Red-billed Duck	Rock Foam
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Aves (Birds)	Lecanoromycetes (Lecanoromycetes)
Order	Anseriformes (Anseriformes)	Lecanorales (Lecanorales)
Family	Anatidae	Stereocaulaceae
Genus	Anas	Stereocaulon
Species	Anas erythrorhyncha	Stereocaulon saxatile

Conservation Status

Red-billed Duck

LC — Least Concern

Rock Foam

NT — Near Threatened

Physical Characteristics

Attribute	Red-billed Duck	Rock Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Red-billed Duck

Habitat

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

Range

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

Rock Foam

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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