A. niger may refer to: Aaptos niger, a sea sponge Abacetus niger, a ground beetle Acanthus niger, a synonym of Acanthus mollis, a plant native to the Mediterranean Achalinus niger, a Taiwanese snake Acromyrmex niger, an ant species found in southern Brazil and Paraguay Afroeurydemus niger, a Congolese ground beetle 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 Allogaster niger, a Nigerian longhorn beetle Amblytelus niger, a ground beetle Amphicrossus niger, a North American sap beetle Andricus niger, a gall wasp species in the genus Andricus Andropogon niger, a synonym of Sorghum bicolor, commonly called sorghum Aneides niger, the Santa Cruz black salamander Aparallactus niger, an African snake Aspergillus niger, the black mold, a fungus species Aspidophorus niger, a synonym of Agonopsis chiloensis, commonly called the snailfish Astronesthes niger, commonly known as the snaggletooth, a deep-sea fish Austropyrgus niger, a freshwater snail
See also Niger (disambiguation)