Bigeye thresher vs White-shouldered Triller

Alopias pelagicus compared with Lalage sueurii

Key Differences

• Bigeye thresher is Endangered while White-shouldered Triller is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	White-shouldered Triller
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Passeriformes (Songbirds)
Family	Alopiidae	Campephagidae
Genus	Alopias	Lalage
Species	Alopias pelagicus	Lalage sueurii

Evolutionary Relationship

Bigeye thresher and White-shouldered Triller share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

White-shouldered Triller

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	White-shouldered Triller
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.

White-shouldered Triller

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.