Bigeye thresher vs Chestnut-collared Swift

Alopias pelagicus compared with Streptoprocne rutila

Key Differences

• Bigeye thresher is Endangered while Chestnut-collared Swift is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Chestnut-collared 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	Streptoprocne
Species	Alopias pelagicus	Streptoprocne rutila

Evolutionary Relationship

Bigeye thresher and Chestnut-collared Swift share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Chestnut-collared Swift

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Chestnut-collared 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.

Chestnut-collared Swift

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

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.

Chestnut-collared Swift

Chestnut-collared Swift (Streptoprocne rutila) 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.

Shared Countries

Both species can be found in 1 countries:

🇨🇴 Colombia