Bigeye thresher vs Bradfield's Swift

Alopias pelagicus compared with Apus bradfieldi

Key Differences

• Bigeye thresher is Endangered while Bradfield's Swift is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Bradfield's Swift
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Apodiformes (Apodiformes)
Family	Alopiidae	Apodidae
Genus	Alopias	Apus
Species	Alopias pelagicus	Apus bradfieldi

Evolutionary Relationship

Bigeye thresher and Bradfield's Swift share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Bradfield's Swift

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Bradfield's Swift
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bigeye thresher

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Distributed across Colombia and Taiwan. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Bradfield's Swift

Habitat

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

Range

Found in Norway.

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

Bradfield's Swift

The Bradfield's swift (Apus bradfieldi) is a species in the genus Apus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.