Common Tern vs Gray-headed Flying Fox

Sterna hirundo compared with Pteropus poliocephalus

Key Differences

• Common Tern is Endangered while Gray-headed Flying Fox is Vulnerable.

Taxonomic Classification

Rank	Common Tern	Gray-headed Flying Fox
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Charadriiformes (Charadriiformes)	Chiroptera (Bats)
Family	Laridae	Pteropodidae (Fruit Bats)
Genus	Sterna	Pteropus (Flying Foxes)
Species	Sterna hirundo	Pteropus poliocephalus

Evolutionary Relationship

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

Conservation Status

Common Tern

EN — Endangered

Gray-headed Flying Fox

VU — Vulnerable

Physical Characteristics

Attribute	Common Tern	Gray-headed Flying Fox
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Tern

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 9 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (7 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela). 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.

Common Tern

Common Tern (Sterna hirundo) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.