Bigeye thresher vs Red-necked Stint

Alopias pelagicus compared with Calidris ruficollis

Key Differences

• Bigeye thresher is Endangered while Red-necked Stint is Not Evaluated.

Taxonomic Classification

Rank	Bigeye thresher	Red-necked Stint
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	Scolopacidae
Genus	Alopias	Calidris
Species	Alopias pelagicus	Calidris ruficollis

Evolutionary Relationship

Bigeye thresher and Red-necked Stint share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Red-necked Stint

NE — Not Evaluated

Physical Characteristics

Attribute	Bigeye thresher	Red-necked Stint
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.

Red-necked Stint

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and Taiwan.

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.

Shared Countries

Both species can be found in 1 countries:

🇹🇼 Taiwan