Bigeye thresher vs Black-backed Bittern

Alopias pelagicus compared with Ixobrychus dubius

Key Differences

• Bigeye thresher is Endangered while Black-backed Bittern is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Black-backed Bittern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Pelecaniformes (Pelecaniformes)
Family	Alopiidae	Ardeidae
Genus	Alopias	Ixobrychus
Species	Alopias pelagicus	Ixobrychus dubius

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Black-backed Bittern

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Black-backed Bittern
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-backed Bittern

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.

Black-backed Bittern

The Black-backed Bittern (Ixobrychus dubius) is a species in the genus Ixobrychus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.