Parsa Wildlife Reserve is a protected area in the lowland Terai of south central Nepal. It was established in 1984 with an area of 499 sq.km in the Parsa, Makwanpur and Bara districts. It is the largest wildlife reserve in the Nepal with rare and endangered wild elephant, tiger, leopard, sloth bear, blue bull and wild dog. Sambar Deer, chital deer, hog deer, barking deer, languor, striped Hyena, ratel and other animals can also be found in the reserve.
Due to its tropical climate, many species of snakes are found in the reserve. The species include king cobra, common cobra, krait, rat, snake and the python. With giant hornbill, peafowl, red jungle fowl, flycatchers and woodpeckers about 300 species of birds are found in the reserve.
From October to December, winter season comes with pleasant temperatures during the day with clear skies whereas nights get extremely cold. During spring, temperatures rise and water becomes scarce. Through July to September, monsoon brings cooling rains, hot and humid day with temperatures up to 40 degree celsius during summer.