Coastal Ragweed vs Ontong Java Flying Fox

Ambrosia hispida compared with Pteropus howensis

Key Differences

Coastal Ragweed is Least Concern while Ontong Java Flying Fox is Critically Endangered.

Taxonomic Classification

Rank	Coastal Ragweed	Ontong Java Flying Fox
Kingdom	Plantae (พืช)	Animalia (สัตว์)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (สัตว์มีแกนสันหลัง)
Class	Magnoliopsida (พืชใบเลี้ยงคู่)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Asterales (อันดับทานตะวัน)	Chiroptera (ค้างคาว)
Family	Asteraceae (Daisy Family)	Pteropodidae (Fruit Bats)
Genus	Ambrosia	Pteropus (Flying Foxes)
Species	Ambrosia hispida	Pteropus howensis

Conservation Status

Coastal Ragweed

LC — Least Concern

Ontong Java Flying Fox

CR — Critically Endangered

Physical Characteristics

Attribute	Coastal Ragweed	Ontong Java Flying Fox
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coastal Ragweed

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Cuba.

Ontong Java Flying Fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Coastal Ragweed

Coastal ragweed (Ambrosia hispida) is a perennial herb in the family Asteraceae, native to the coastal dunes, sandy beaches, and cays of Cuba, the Bahamas, and the wider Caribbean region. It grows in pioneer beach and dune vegetation, often forming spreading colonies that help stabilise loose coastal sands. Like other members of the genus Ambrosia, it bears inconspicuous greenish-white flowers arranged in racemes; male flower heads produce wind-dispersed pollen that can trigger allergic rhinitis in sensitive individuals. The deeply lobed, hispid leaves are adapted to reflect intense solar radiation and tolerate salt spray. Coastal ragweed plays an ecological role in early dune succession, binding sand and enabling other plant species to establish. The genus is widespread globally, with several Ambrosia species considered noxious weeds in agricultural settings, though Ambrosia hispida is restricted to its native Caribbean coastal range. The IUCN assesses it as Least Concern, reflecting adequate population size across its Caribbean coastal distribution. Pressure from coastal development and tourism infrastructure poses a localised threat to dune communities it inhabits.