The Nabji-Korphu Trek is a post-harvest and post winter trekking that is limited within the Jigme Singye Wangchuck National Park in central Bhutan. It follows a 6 days low-altitude route that takes you through six villages. You can experience the sight of Golden Langur that is one of the rarest species today, and is found only in Bhutan and in Assam, India. The trail also offers you the experience of viewing the endangered Rufous-necked Hornbill, and some other birds along with a wide range of Himalayan plants and flowers. The best time for embarking on this trek is winter, between October and April.