Dudhwa National Park Dudhwa Tiger Reserve is one of the finest few remaining examples of the exceedingly diverse and productive Tarai eco-system. The northern edge of the reserve lies along the Indo-Nepal border and the southern boundary is marked by the river Suheli. It is well known sanctuary of the swamp deer and is home to tigers, leopards, varieties of deer, antelopes, elephants, jackal, hyena etc, amid thick green forest and grassland. It is also a bird watchers heaven. A large number of rhinos are also found here.