Cay Sua vs Variable Bluet

Alstonia scholaris compared with Coenagrion pulchellum

Key Differences

• Cay Sua is Least Concern while Variable Bluet is Endangered.

Taxonomic Classification

Rank	Cay Sua	Variable Bluet
Kingdom	Plantae (thực vật)	Animalia (động vật)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (động vật Chân khớp)
Class	Magnoliopsida (Dicots)	Insecta (côn trùng)
Order	Gentianales (Bộ Long đởm)	Odonata (Chuồn chuồn)
Family	Apocynaceae	Coenagrionidae
Genus	Alstonia	Coenagrion
Species	Alstonia scholaris	Coenagrion pulchellum

Conservation Status

Cay Sua

LC — Least Concern

Variable Bluet

EN — Endangered

Physical Characteristics

Attribute	Cay Sua	Variable Bluet
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cay Sua

Habitat

Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Range

Distributed across Micronesia, Taiwan, and United States.

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.

Cay Sua

The Blackboard Tree (Alstonia scholaris) is a species in the genus Alstonia. It is currently classified as Least Concern on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Variable Bluet

Variable Bluet (Coenagrion pulchellum) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.