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
Leith's softshell turtle Leith's softshell turtle Leith's softshell turtle ("Nilssonia leithii" ) is a species of turtle found in peninsular Indian rivers including the Bhavani, Godavari, and Moyar Rivers. The type locality is Pune in India. The specific name, "leithii", is in honor of Andrew H. Leith, a physician with the Bombay Sanitary Commission. "Nilssonia leithii" is intermediate between "Nilssonia gangetica" and "Nilssonia hurum". It is like the former in the width of the interorbital apace, the comparatively short mandibular symphysis, and the markings of the head. It is like the latter in the longer and more pointed snout, the absence of a