Bigeye thresher vs Spot-backed Puffbird

Alopias pelagicus compared with Nystalus maculatus

Key Differences

• Bigeye thresher is Endangered while Spot-backed Puffbird is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Spot-backed Puffbird
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Piciformes (Piciformes)
Family	Alopiidae	Bucconidae
Genus	Alopias	Nystalus
Species	Alopias pelagicus	Nystalus maculatus

Evolutionary Relationship

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

Conservation Status

Bigeye thresher

EN — Endangered

Spot-backed Puffbird

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Spot-backed Puffbird
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.

Spot-backed Puffbird

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.