vs Red-billed Duck

Chrysosphaerella longispina compared with Anas erythrorhyncha

Key Differences

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

Taxonomic Classification

Rank		Red-billed Duck
Kingdom	Chromista (Chromista)	Animalia (động vật)
Phylum	Ochrophyta (Ochrophyta)	Chordata (động vật có dây sống)
Class	Chrysophyceae (Chrysophyceae)	Aves (chim)
Order	Ochromonadales (Ochromonadales)	Anseriformes (bộ Ngỗng)
Family	Paraphysomonadaceae	Anatidae
Genus	Chrysosphaerella	Anas
Species	Chrysosphaerella longispina	Anas erythrorhyncha

Conservation Status

NE — Not Evaluated

Red-billed Duck

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Red-billed Duck

Habitat

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

Range

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

Chrysosphaerella longispina is a colonial chrysophyte alga in the genus Chrysosphaerella, notable for the long silica spines (longispina: Latin, long spine) that project from each cell in the colony. The genus is characterized by spherical or discoid colonies of photosynthetic cells that each secrete siliceous scales and elongated spine-like appendages, making Chrysosphaerella colonies distinctively bristled and visible under light microscopy. The long spines of C. longispina likely serve as anti-predation structures that make the colonies more difficult for zooplankton to ingest. C. longispina is found in cold, oligotrophic freshwater lakes, particularly in Scandinavia, where comprehensive chrysophyte surveys have documented its presence. Chrysosphaerella colonies contribute to freshwater primary production and the cycling of biogenic silica, which upon cell dissolution is deposited in lake sediments as microscopically identifiable remains. These silica structures are widely used by paleolimnologists to reconstruct past changes in lake water chemistry, thermal stratification, and climate. The conservation status of C. longispina has not been assessed by the IUCN; the species is listed as Not Evaluated.

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