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