Gilliard's Flying Fox vs Long-tailed Sylph

Pteropus gilliardorum compared with Aglaiocercus kingii

Key Differences

• Gilliard's Flying Fox is Vulnerable while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Gilliard's Flying Fox	Long-tailed Sylph
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Chiroptera (Bats)	Apodiformes (Apodiformes)
Family	Pteropodidae (Fruit Bats)	Trochilidae
Genus	Pteropus (Flying Foxes)	Aglaiocercus
Species	Pteropus gilliardorum	Aglaiocercus kingii

Evolutionary Relationship

Gilliard's Flying Fox and Long-tailed Sylph share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Gilliard's Flying Fox

VU — Vulnerable

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Gilliard's Flying Fox	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Gilliard's Flying Fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Long-tailed Sylph

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Long-tailed Sylph

One of the most strikingly ornamented hummingbirds, male long-tailed sylphs have iridescent green plumage and dramatically elongated, ribbon-like outer tail feathers reaching up to 22 cm — over three times the body length. Found in Andean cloud forests of Colombia and Venezuela, they inhabit humid montane forest between 1,400–2,800 meters elevation. Males perform elaborate display flights to attract females. Their extravagant tails are a classic example of sexual selection via female preference.