Cay Sua vs Common Periwinkle

Alstonia scholaris compared with Littorina littorea

Taxonomic Classification

Rank	Cay Sua	Common Periwinkle
Kingdom	Plantae (thực vật)	Animalia (động vật)
Phylum	Magnoliophyta (Flowering Plants)	Mollusca (động vật thân mềm)
Class	Magnoliopsida (Dicots)	Gastropoda (Lớp Chân bụng)
Order	Gentianales (Bộ Long đởm)	Littorinimorpha (Littorinimorpha)
Family	Apocynaceae	Littorinidae
Genus	Alstonia	Littorina
Species	Alstonia scholaris	Littorina littorea

Conservation Status

Cay Sua

LC — Least Concern

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Cay Sua	Common Periwinkle
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.

Common Periwinkle

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found across Europe (4 countries) and North America (Canada, United States).

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.

Common Periwinkle

Common Periwinkle (Littorina littorea) 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.