Red-billed Duck vs

Anas erythrorhyncha compared with Trichormus variabilis

Key Differences

• Red-billed Duck is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Red-billed Duck
Kingdom	Animalia (Animals)	Bacteria (Bacteria)
Phylum	Chordata (Chordates)	Cyanobacteria (Cyanobacteria)
Class	Aves (Birds)	Cyanobacteriia
Order	Anseriformes (Anseriformes)	Cyanobacteriales
Family	Anatidae	Nostocaceae
Genus	Anas	Trichormus
Species	Anas erythrorhyncha	Trichormus variabilis

Conservation Status

Red-billed Duck

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Red-billed Duck
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).

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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.

Trichormus variabilis is a filamentous, nitrogen-fixing cyanobacterium in the family Nostocaceae. It forms heterocysts — specialized nitrogen-fixing cells — within its trichomes and is found in freshwater, soil, and symbiotic associations. Its conservation status is not evaluated.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway