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are squared instead of tapered. The neck is visibly constricted and the blowhole is a longitudinal slit. There are 28 to 29 teeth on either side of the jaw. The eye and optic nerve of the Ganges river dolphin are degenerate. The eye lacks a lens and is therefore incapable of forming images on the
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varies from lead-colored to black. The undersides are lighter in color. The rostrum is 18 to 21 cm in length and the forehead is steep and rises abruptly from the base of the snout. The dorsal fin is rudimentary and ridge-like, and the ends of the pectoral
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retina. However, it functions in light-detection. It is believed that the lack of a true visual apparatus in the river dolphin is related to its habitat; the water in which it lives is so muddied that vision in essentially useless.
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population. It has diverse landscapes, sheltering rich wildlife habitats and floral and faunal composition, with the prime protected carnivores.
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ranges from 2.3 to 2.6 meters in length. The tail fluke is on average 46 cm in width.
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The state of Bihar has a total of 21 Wildlife
Sanctuaries and 1 National Park (
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Official Bihar
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181:systems. It is among the most endangered
116:Learn how and when to remove this message
160:Valmiki National Park, West Champaran
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50:adding citations to reliable sources
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243:Protected areas of Bihar
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214:Valmiki National Park
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248:Patna Zoo
106:June 2022
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