Eurasian Eagle-Owl vs Gray-headed Flying Fox

Bubo bubo compared with Pteropus poliocephalus

Key Differences

Eurasian Eagle-Owl is Endangered while Gray-headed Flying Fox is Vulnerable.

Taxonomic Classification

Rank	Eurasian Eagle-Owl	Gray-headed Flying Fox
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Strigiformes (Owls)	Chiroptera (Bats)
Family	Strigidae (True Owls)	Pteropodidae (Fruit Bats)
Genus	Bubo (Eagle Owls)	Pteropus (Flying Foxes)
Species	Bubo bubo	Pteropus poliocephalus

Evolutionary Relationship

Eurasian Eagle-Owl and Gray-headed Flying Fox share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Eurasian Eagle-Owl

EN — Endangered

Population: ~400.0K

Trend: Stable →

Gray-headed Flying Fox

VU — Vulnerable

Physical Characteristics

Attribute	Eurasian Eagle-Owl	Gray-headed Flying Fox
Diet	Carnivore	—
Average Lifespan	20 years	—
Average Length	70 cm	—
Average Weight	3.0 kg	—

Habitat & Geographic Range

Eurasian Eagle-Owl

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Found across Europe (9 countries) and South America (Ecuador). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Gray-headed Flying Fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Eurasian Eagle-Owl

The world's largest owl species by height and weight, Eurasian eagle-owls have wingspans up to 1.9 meters and inhabit rocky landscapes, forest edges, and cliffs from Europe across Asia to China. Silent nocturnal hunters with powerful talons, they prey on rabbits, hares, foxes, and even other raptors. Their deep, resonant hooting carries over great distances. Relatively stable in population, though persecuted historically.