Bigeye thresher vs small tortoiseshell

Alopias pelagicus compared with Aglais urticae

Key Differences

• Bigeye thresher is Endangered while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Bigeye thresher	small tortoiseshell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Chondrichthyes (Cartilaginous Fish)	Insecta (Insects)
Order	Lamniformes (Mackerel Sharks)	Lepidoptera (Butterflies & Moths)
Family	Alopiidae	Nymphalidae (Brush-footed Butterflies)
Genus	Alopias	Aglais
Species	Alopias pelagicus	Aglais urticae

Evolutionary Relationship

Bigeye thresher and small tortoiseshell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bigeye thresher

EN — Endangered

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Bigeye thresher	small tortoiseshell
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.

small tortoiseshell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (41 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

small tortoiseshell

small tortoiseshell (Aglais urticae) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.