Suklaphanta National Park holds the world's largest herd of swamp deer (barasingha), a species that was once critically low in number and has recovered significantly inside the park's 305 square kilometres. Morning jeep safaris across the open phanta are the best time to spot the herds, sometimes numbering in the hundreds, along with Bengal tiger, wild elephant, blackbuck, blue bull and spotted deer. Rani Tal, the park's main lake at the centre of the grassland, draws crocodile and a wide range of waterbirds.
More than 450 bird species have been recorded in Suklaphanta, including the Bengal florican, sarus crane, lesser adjutant stork and numerous raptors, making it one of the most productive birding sites in Nepal's Terai. Guided jungle walks at the forest edge add a different perspective from the jeep safaris. An afternoon in a Tharu village includes a walk through the settlement and a traditional Tharu cultural-dance performance.