Bigeye thresher vs Slender-billed Grackle

Alopias pelagicus compared with Quiscalus palustris

Key Differences

• Bigeye thresher is Endangered while Slender-billed Grackle is Extinct.

Taxonomic Classification

Rank	Bigeye thresher	Slender-billed Grackle
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	Icteridae
Genus	Alopias	Quiscalus
Species	Alopias pelagicus	Quiscalus palustris

Evolutionary Relationship

Bigeye thresher and Slender-billed Grackle share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Slender-billed Grackle

EX — Extinct

Physical Characteristics

Attribute	Bigeye thresher	Slender-billed Grackle
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.

Slender-billed Grackle

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.