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The last rhinoceros was shot in Champaran in 1939. The Ramnagar Dun forests which adjoin the Nepal terai came under the State management only in 1950. The Bettiah forests near Bagaha are still not under State management. A sanctuary extending from the Nepal border to Bagaha across the Ramnagar Hills would help protect rhinoceros, deer, tiger etc. It might be necessary to reintroduce rhinoceros from the Assam or Bengal sanctuaries though it is possible that some animals may seek refuge here from the Nepal terai.
Rhinoceros may also be established by stocking in the Purnea district iof the vast grassy plains near Araria are afforested or the existing forests protected.