Brook Floater vs Variable Bluet

Alasmidonta varicosa compared with Coenagrion pulchellum

Key Differences

• Brook Floater is Vulnerable while Variable Bluet is Endangered.

Taxonomic Classification

Rank	Brook Floater	Variable Bluet
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Mollusca (軟体動物)	Arthropoda (節足動物)
Class	Bivalvia (二枚貝)	Insecta (昆虫)
Order	Unionida (イシガイ目)	Odonata (蜻蛉目)
Family	Unionidae	Coenagrionidae
Genus	Alasmidonta	Coenagrion
Species	Alasmidonta varicosa	Coenagrion pulchellum

Evolutionary Relationship

Brook Floater and Variable Bluet share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Brook Floater

VU — Vulnerable

Variable Bluet

EN — Endangered

Physical Characteristics

Attribute	Brook Floater	Variable Bluet
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Floater

Habitat

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

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Variable Bluet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Luxembourg, Norway, and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.

Variable Bluet

ムラサキイトトンボ類(Coenagrion pulchellum)はIUCNレッドリストで絶滅危惧(EN)に指定されています。野生での絶滅リスクが高く、個体群の著しい減少と生存に対する継続的な脅威があります。