Bigeye thresher vs Rough-faced shag

Alopias pelagicus compared with Leucocarbo carunculatus

Key Differences

• Bigeye thresher is Endangered while Rough-faced shag is Vulnerable.

Taxonomic Classification

Rank	Bigeye thresher	Rough-faced shag
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Suliformes (Suliformes)
Family	Alopiidae	Phalacrocoracidae
Genus	Alopias	Leucocarbo
Species	Alopias pelagicus	Leucocarbo carunculatus

Evolutionary Relationship

Bigeye thresher and Rough-faced shag share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Rough-faced shag

VU — Vulnerable

Physical Characteristics

Attribute	Bigeye thresher	Rough-faced shag
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.

Rough-faced shag

Habitat

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

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.