Chuuk Flying Fox vs Hairy Big-eyed Bat

Pteropus pelagicus compared with Chiroderma villosum

Key Differences

• Chuuk Flying Fox is Endangered while Hairy Big-eyed Bat is Least Concern.

Taxonomic Classification

Rank	Chuuk Flying Fox	Hairy Big-eyed Bat
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order same	Chiroptera (翼手目)	Chiroptera (翼手目)
Family	Pteropodidae (Fruit Bats)	Phyllostomidae
Genus	Pteropus (Flying Foxes)	Chiroderma
Species	Pteropus pelagicus	Chiroderma villosum

Evolutionary Relationship

Chuuk Flying Fox and Hairy Big-eyed Bat share a common ancestor at the Order level: Chiroptera. (翼手目)

Conservation Status

Chuuk Flying Fox

EN — Endangered

Hairy Big-eyed Bat

LC — Least Concern

Physical Characteristics

Attribute	Chuuk Flying Fox	Hairy Big-eyed Bat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chuuk Flying Fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Hairy Big-eyed Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

Chuuk Flying Fox

The Chuuk flying fox (Pteropus pelagicus) is a large fruit bat in the family Pteropodidae, endemic to Chuuk (Truk) Lagoon in the Federated States of Micronesia, central Pacific Ocean. It occupies forested islands within the lagoon, roosting in large trees and foraging nocturnally on ripe fruits, nectar, and flowers of native tropical vegetation. As one of the few native pollinators and seed dispersers on these small island ecosystems, the Chuuk flying fox plays an essential ecological role in maintaining forest regeneration. The species is classified as Endangered by the IUCN, primarily due to its extremely restricted range—confined to a small island group—and ongoing hunting pressure for bushmeat, which is traditional in parts of Micronesia. Habitat loss from typhoons, agricultural conversion, and human development further threatens its already limited habitat. Pteropus bats across the Pacific have faced severe declines from overhunting, with several island species now extinct. The Chuuk flying fox has a wingspan that can exceed one meter, and roosts colonially in forest canopy trees. International agreements and national legislation within the Federated States of Micronesia provide some protection, but enforcement remains challenging. Population surveys and community-based conservation programs are urgently needed to stabilize this species.