Notched Rustwort vs Red-billed Duck

Marsupella emarginata compared with Anas erythrorhyncha

Key Differences

• Notched Rustwort is Extinct while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Notched Rustwort	Red-billed Duck
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Chordata (Chordates)
Class	Jungermanniopsida (Jungermanniopsida)	Aves (Birds)
Order	Jungermanniales (Jungermanniales)	Anseriformes (Anseriformes)
Family	Gymnomitriaceae	Anatidae
Genus	Marsupella	Anas
Species	Marsupella emarginata	Anas erythrorhyncha

Conservation Status

Notched Rustwort

EX — Extinct

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Notched Rustwort	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Notched Rustwort

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (United States), and South America (Colombia).

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 2 countries:

🇧🇪 Belgium 🇳🇴 Norway