Bigeye thresher vs Four-spotted Chaser

Alopias pelagicus compared with Libellula quadrimaculata

Key Differences

• Bigeye thresher is Endangered while Four-spotted Chaser is Least Concern.

Taxonomic Classification

Rank	Bigeye thresher	Four-spotted Chaser
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Chondrichthyes (Cartilaginous Fish)	Insecta (Insects)
Order	Lamniformes (Mackerel Sharks)	Odonata (Odonata)
Family	Alopiidae	Libellulidae
Genus	Alopias	Libellula
Species	Alopias pelagicus	Libellula quadrimaculata

Evolutionary Relationship

Bigeye thresher and Four-spotted Chaser share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bigeye thresher

EN — Endangered

Four-spotted Chaser

LC — Least Concern

Physical Characteristics

Attribute	Bigeye thresher	Four-spotted Chaser
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.

Four-spotted Chaser

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (5 countries) and North America (United States).

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.

Four-spotted Chaser

Four-spotted Chaser (Libellula quadrimaculata) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.