A. niger
# A. niger

A. niger may refer to:

* Acromyrmex niger, an ant species found in southern Brazil and Paraguay
* Agelastes niger, the black guineafowl, a bird species found in humid forests of Central Africa
* Allocyttus niger, the black oreo, a fish species found around Australia and New Zealand
* Andricus niger, a gall wasp species in the genus Andricus
* Aspergillus niger, the black mold, a fungus species
