Bigeye thresher vs Bridled Tern

Alopias pelagicus compared with Onychoprion anaethetus

Key Differences

• Bigeye thresher is Endangered while Bridled Tern is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Bridled Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Charadriiformes (Charadriiformes)
Family	Alopiidae	Laridae
Genus	Alopias	Onychoprion
Species	Alopias pelagicus	Onychoprion anaethetus

Evolutionary Relationship

Bigeye thresher and Bridled Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Bridled Tern

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Bridled Tern
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.

Bridled Tern

Habitat

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

Range

Found across Europe (4 countries) and South America (Colombia, Ecuador, 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.

Bridled Tern

The Bridled Tern (Onychoprion anaethetus) is a species in the genus Onychoprion. 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:

🇨🇴 Colombia