Amazon Black Howler vs Bigeye thresher

Alouatta nigerrima compared with Alopias pelagicus

Key Differences

• Amazon Black Howler is Least Concern while Bigeye thresher is Endangered.

Taxonomic Classification

Rank	Amazon Black Howler	Bigeye thresher
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Primates (Primates)	Lamniformes (Mackerel Sharks)
Family	Atelidae	Alopiidae
Genus	Alouatta	Alopias
Species	Alouatta nigerrima	Alopias pelagicus

Evolutionary Relationship

Amazon Black Howler and Bigeye thresher share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Amazon Black Howler

LC — Least Concern

Bigeye thresher

EN — Endangered

Physical Characteristics

Attribute	Amazon Black Howler	Bigeye thresher
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Amazon Black Howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Amazon Black Howler

The Amazon Black Howler (Alouatta nigerrima) is a species in the genus Alouatta. It is currently classified as Least Concern on the IUCN Red List. 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.