Arctic Tern vs Bare-legged Swiftlet

Sterna paradisaea compared with Aerodramus nuditarsus

Taxonomic Classification

Rank	Arctic Tern	Bare-legged Swiftlet
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Charadriiformes (Charadriiformes)	Apodiformes (Apodiformes)
Family	Laridae	Apodidae
Genus	Sterna	Aerodramus
Species	Sterna paradisaea	Aerodramus nuditarsus

Evolutionary Relationship

Arctic Tern and Bare-legged Swiftlet share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Arctic Tern

LC — Least Concern

Bare-legged Swiftlet

LC — Least Concern

Physical Characteristics

Attribute	Arctic Tern	Bare-legged Swiftlet
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arctic Tern

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Colombia, Ecuador).

Bare-legged Swiftlet

Habitat

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

Range

Found in Norway.

Arctic Tern

Arctic Tern (Sterna paradisaea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Bare-legged Swiftlet

The Bare-legged Swiftlet (Aerodramus nuditarsus) is a species in the genus Aerodramus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway