Amazon Black Howler vs

Alouatta nigerrima compared with Trichormus variabilis

Key Differences

• Amazon Black Howler is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Amazon Black Howler
Kingdom	Animalia (Animals)	Bacteria (Bacteria)
Phylum	Chordata (Chordates)	Cyanobacteria (Cyanobacteria)
Class	Mammalia (Mammals)	Cyanobacteriia
Order	Primates (Primates)	Cyanobacteriales
Family	Atelidae	Nostocaceae
Genus	Alouatta	Trichormus
Species	Alouatta nigerrima	Trichormus variabilis

Conservation Status

Amazon Black Howler

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

Amazon Black Howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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.

Trichormus variabilis is a filamentous, nitrogen-fixing cyanobacterium in the family Nostocaceae. It forms heterocysts — specialized nitrogen-fixing cells — within its trichomes and is found in freshwater, soil, and symbiotic associations. Its conservation status is not evaluated.