A. fuscus

A. fuscus may refer to:

• Abacetus fuscus, a ground beetle
• Acanthoclinus fuscus, the olive rockfish, found in New Zealand
• Acanthogethes fuscus, a sap beetle
• Aconaemys fuscus, the Chilean rock rat
• Acridotheres fuscus, the jungle myna, a bird found in India
• Acrocephalus fuscus, a synonym of Acrocephalus scirpaceus, the common reed warbler, a bird found in Europe and Africa
• Adzhosuchus fuscus, a prehistoric reptile
• Aipysurus fuscus, a sea snake found in the Timor Sea
• Alampyris fuscus, a synonym of Alampyris fusca, a longhorn beetle found in Costa Rica
• Anabazenops fuscus, the white-collared foliage-gleaner, a bird found in Brazil
• Ancharius fuscus, a catfish found in Madagascar
  • Arius fuscus, a synonym of Ancharius fuscus
• Anthrenus fuscus, a carpet beetle found in North America and Europe
• Aplonis fuscus, a synonym of Aplonis fusca, the Tasman starling, an extinct bird
• Apsilus fuscus, the African forktail snapper, a fish found in the eastern Atlantic Ocean
• Arion fuscus, a land slug found in Europe
• Aroegas fuscus, the brown false shieldback, a katydid found in South Africa
• Artamus fuscus, the ashy woodswallow, a bird found in south Asia
• Atrosalarias fuscus, a fish found in the Indian Ocean
• Auriculibuller fuscus, a synonym of Papiliotrema bandonii, a fungus