Bigeye thresher vs Eastern Marsh-Harrier

Alopias pelagicus compared with Circus spilonotus

Key Differences

• Bigeye thresher is Endangered while Eastern Marsh-Harrier is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Eastern Marsh-Harrier
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Lamniformes (Mackerel Sharks)	Accipitriformes (Hawks & Eagles)
Family	Alopiidae	Accipitridae (Hawks & Eagles)
Genus	Alopias	Circus
Species	Alopias pelagicus	Circus spilonotus

Evolutionary Relationship

Bigeye thresher and Eastern Marsh-Harrier share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Eastern Marsh-Harrier

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Eastern Marsh-Harrier
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.

Eastern Marsh-Harrier

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Norway and Taiwan.

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.

Shared Countries

Both species can be found in 1 countries:

🇹🇼 Taiwan