Bigeye thresher vs Olive-crowned Crescentchest

Alopias pelagicus compared with Melanopareia maximiliani

Key Differences

• Bigeye thresher is Endangered while Olive-crowned Crescentchest is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Olive-crowned Crescentchest
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Passeriformes (Songbirds)
Family	Alopiidae	Melanopareiidae
Genus	Alopias	Melanopareia
Species	Alopias pelagicus	Melanopareia maximiliani

Evolutionary Relationship

Bigeye thresher and Olive-crowned Crescentchest share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Olive-crowned Crescentchest

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Olive-crowned Crescentchest
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.

Olive-crowned Crescentchest

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.