Bigeye thresher vs Chestnut-breasted Cuckoo

Alopias pelagicus compared with Cacomantis castaneiventris

Key Differences

• Bigeye thresher is Endangered while Chestnut-breasted Cuckoo is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Chestnut-breasted Cuckoo
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Cuculiformes (Cuculiformes)
Family	Alopiidae	Cuculidae
Genus	Alopias	Cacomantis
Species	Alopias pelagicus	Cacomantis castaneiventris

Evolutionary Relationship

Bigeye thresher and Chestnut-breasted Cuckoo share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Chestnut-breasted Cuckoo

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Chestnut-breasted Cuckoo
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.

Chestnut-breasted Cuckoo

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.

Chestnut-breasted Cuckoo

The Chestnut-breasted Cuckoo (Cacomantis castaneiventris) is a species in the genus Cacomantis. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.