Black-crowned Barwing vs

Actinodura sodangorum compared with Chrysosphaerella coronacircumspina

Key Differences

Black-crowned Barwing is Near Threatened while is Not Evaluated.

Taxonomic Classification

Rank	Black-crowned Barwing
Kingdom	Animalia (Animals)	Chromista (Chromista)
Phylum	Chordata (cordados)	Ochrophyta (Ochrophyta)
Class	Aves (ave)	Chrysophyceae (Chrysophyceae)
Order	Passeriformes (Songbirds)	Ochromonadales (Ochromonadales)
Family	Leiothrichidae	Paraphysomonadaceae
Genus	Actinodura	Chrysosphaerella
Species	Actinodura sodangorum	Chrysosphaerella coronacircumspina

Conservation Status

Black-crowned Barwing

NT — Near Threatened

NE — Not Evaluated

Physical Characteristics

Attribute	Black-crowned Barwing
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-crowned Barwing

Habitat

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

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

Black-crowned Barwing

The Black-crowned Barwing (Actinodura sodangorum) is a species in the genus Actinodura. It is currently classified as Near Threatened on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments. Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Chrysosphaerella coronacircumspina is a colonial chrysophyte alga in the genus Chrysosphaerella, family Chromulinaceae. Its compound specific epithet corona-circumspina (Latin: crown of surrounding spines) references the distinctive arrangement of silica spines forming a ring or crown around each cell in the colony. Each cell in a Chrysosphaerella colony bears both flat siliceous scales and long, projecting spines, with the spine arrangement being species-specific and taxonomically diagnostic. The colonial organization is held together by organic matrix material, creating a spherical or semi-spherical aggregate visible under light microscopy. C. coronacircumspina is found in freshwater phytoplankton communities in Scandinavia, consistent with the broader distribution of Chrysosphaerella in cold-temperate and subarctic lakes. The silica structures produced by Chrysosphaerella cells are deposited in lake sediments upon cell death, creating millennial-scale paleoenvironmental archives. Chrysophytes are sensitive to lake acidification, nutrients, and temperature, making them useful climate proxies in paleolimnological research. The species has not been assessed for conservation status by the IUCN and is listed as Not Evaluated.