Bigeye thresher vs Black-tailed Gull

Alopias pelagicus compared with Larus crassirostris

Key Differences

• Bigeye thresher is Endangered while Black-tailed Gull is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Black-tailed Gull
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	Larus
Species	Alopias pelagicus	Larus crassirostris

Evolutionary Relationship

Bigeye thresher and Black-tailed Gull share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Black-tailed Gull

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Black-tailed Gull
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.

Black-tailed Gull

Habitat

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

Range

Distributed across Norway, Taiwan, and United States.

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.

Black-tailed Gull

The Black-tailed Gull (Larus crassirostris) is a species in the genus Larus. It is currently classified as Least Concern on the IUCN Red List. Distributed across Norway, Taiwan, and United States.

Shared Countries

Both species can be found in 1 countries:

🇹🇼 Taiwan