Bigeye thresher vs black-shanked douc

Alopias pelagicus compared with Pygathrix nigripes

Key Differences

• Bigeye thresher is Endangered while black-shanked douc is Critically Endangered.

Taxonomic Classification

Rank	Bigeye thresher	black-shanked douc
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Lamniformes (Mackerel Sharks)	Primates (Primates)
Family	Alopiidae	Cercopithecidae (Old World Monkeys)
Genus	Alopias	Pygathrix
Species	Alopias pelagicus	Pygathrix nigripes

Evolutionary Relationship

Bigeye thresher and black-shanked douc share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

black-shanked douc

CR — Critically Endangered

Physical Characteristics

Attribute	Bigeye thresher	black-shanked douc
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.

black-shanked douc

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

black-shanked douc

The Black-shanked douc (Pygathrix nigripes) is a species in the genus Pygathrix. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.