A little more than 60 Royal Bengal tigers roam Bardia National Park, around one-fourth the total tiger population in Nepal. Together with the adjacent Banke National Park, Bardia forms part of the 860 square mile Tiger Conservation Unit, where visitors have a sporting chance of seeing the usually elusive great cats in the wild. Because it’s more remote than the better known Chitwan National Park, few people visit the less developed Bardia, allowing flora and fauna to flourish. Tigers and one-horned rhinos are especially abundant here, but more than 50…