Bare-legged Swiftlet vs Fen Roller

Aerodramus nuditarsus compared with Ancylis paludana

Key Differences

• Bare-legged Swiftlet is Least Concern while Fen Roller is Near Threatened.

Taxonomic Classification

Rank	Bare-legged Swiftlet	Fen Roller
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Insecta (Insects)
Order	Apodiformes (Apodiformes)	Lepidoptera (Butterflies & Moths)
Family	Apodidae	Tortricidae
Genus	Aerodramus	Ancylis
Species	Aerodramus nuditarsus	Ancylis paludana

Evolutionary Relationship

Bare-legged Swiftlet and Fen Roller share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bare-legged Swiftlet

LC — Least Concern

Fen Roller

NT — Near Threatened

Physical Characteristics

Attribute	Bare-legged Swiftlet	Fen Roller
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bare-legged Swiftlet

Habitat

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

Range

Found in Norway.

Fen Roller

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.