Amazon Black Howler vs Smooth hound

Alouatta nigerrima compared with Triakis maculata

Key Differences

• Amazon Black Howler is Least Concern while Smooth hound is Critically Endangered.

Taxonomic Classification

Rank	Amazon Black Howler	Smooth hound
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Primates (Primates)	Carcharhiniformes (Ground Sharks)
Family	Atelidae	Triakidae
Genus	Alouatta	Triakis
Species	Alouatta nigerrima	Triakis maculata

Evolutionary Relationship

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

Conservation Status

Amazon Black Howler

LC — Least Concern

Smooth hound

CR — Critically Endangered

Physical Characteristics

Attribute	Amazon Black Howler	Smooth hound
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Amazon Black Howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Smooth hound

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Found in Chile. Currently classified as Critically 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.