Bigeye thresher vs Pomarine Jaeger

Alopias pelagicus compared with Stercorarius pomarinus

Key Differences

• Bigeye thresher is Endangered while Pomarine Jaeger is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Pomarine Jaeger
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	Stercorariidae
Genus	Alopias	Stercorarius
Species	Alopias pelagicus	Stercorarius pomarinus

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Pomarine Jaeger

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Pomarine Jaeger
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.

Pomarine Jaeger

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), North America (United States), 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.

Pomarine Jaeger

Pomarine Jaeger (Stercorarius pomarinus) 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 2 countries:

🇨🇴 Colombia 🇹🇼 Taiwan