Ray's Knotgrass vs Red-billed Duck

Polygonum oxyspermum compared with Anas erythrorhyncha

Key Differences

• Ray's Knotgrass is Endangered while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Ray's Knotgrass	Red-billed Duck
Kingdom	Plantae (식물)	Animalia (동물)
Phylum	Magnoliophyta (피자식물문)	Chordata (척삭동물)
Class	Magnoliopsida (목련강)	Aves (새)
Order	Caryophyllales (석죽목)	Anseriformes (기러기목)
Family	Polygonaceae	Anatidae
Genus	Polygonum	Anas
Species	Polygonum oxyspermum	Anas erythrorhyncha

Conservation Status

Ray's Knotgrass

EN — Endangered

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Ray's Knotgrass	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ray's Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as 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

붉은부리오리(Anas erythrorhyncha)는 IUCN 적색목록에서 최소우려(LC)로 분류된다. 분포 범위 전역에서 흔하고 개체 수가 안정적이며 즉각적인 보전 우려가 없다.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway