With one of our Bhutan trip packages, explore the Bumdeling Wildlife Sanctuary and the wildness of the “Land of Thunder Dragon.” Since the Bumdeling Wildlife Sanctuary in Bhutan is one of the two main winter roosting sites for the critically endangered Black Necked Crane worldwide, it has been tentatively included to the UNESCO World Heritage Site list. Additionally, Ludlow’s Bhutan Swallowtail, the state butterfly of Bhutan, only lives there.