Bigeye thresher vs Black-shouldered Nightjar

Alopias pelagicus compared with Caprimulgus nigriscapularis

Key Differences

• Bigeye thresher is Endangered while Black-shouldered Nightjar is Not Evaluated.

Taxonomic Classification

Rank	Bigeye thresher	Black-shouldered Nightjar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Caprimulgiformes (Caprimulgiformes)
Family	Alopiidae	Caprimulgidae
Genus	Alopias	Caprimulgus
Species	Alopias pelagicus	Caprimulgus nigriscapularis

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Black-shouldered Nightjar

NE — Not Evaluated

Physical Characteristics

Attribute	Bigeye thresher	Black-shouldered Nightjar
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-shouldered Nightjar

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-shouldered Nightjar

The Black-shouldered Nightjar (Caprimulgus nigriscapularis) is a species in the genus Caprimulgus. Typically found in various aerial, terrestrial, and aquatic environments.