Ganges Delta trees are found in these areas. The delta region has mangrove trees. It is estimated that 30,000 chital ("Axis axis") are in the Sundarbans part of the delta. Birds found in the delta include kingfishers, eagles, woodpeckers, the shalik ("Acridotheres tristis"), the swamp francolin ("Francolinus gularis"), and the doel ("Copsychus saularis"). Two species of dolphin can be found in the delta: the Irrawaddy dolphin ("Orcaella brevirostris") and the Ganges river dolphin ("Platanista gangetica gangetica"). The Irrawaddy dolphin is an oceanic dolphin which enters the delta from the Bay of Bengal. The Ganges river dolphin is a true river dolphin, but
Catacroptera dark brown underside. The larvae feed on "Justicia protracta", "Barleria stuhlmanni", "Ruellia cordata", "Asystasia gangetica", "Barleria opaca", "Ruellia togoensis", "Chaetacanthus setiger", "Asclepias" and "Phaulopsis" species. Catacroptera Catacroptera is a monotypic butterfly genus of the subfamily Nymphalinae in the family Nymphalidae found in sub-Saharan Africa. The habitat consists of grassland and savanna. Adults are on wing year round, but from September to April in cooler areas. The single species, Catacroptera cloanthe, the pirate, has a wingspan of 50 to 63 mm. Its dorsal colour is orange with rows of dark bands in the forewing and blue spots surrounded by darker brown