The Phobjikha Valley ཕོབ་སྦྱིས་ཁ spelled as Pho-sbis-kha, (the suffix kha is an element in many place-names in Bhutan and its use is generally optional both in colloquial speech and in literary forms) is a vast U-shaped valley in central Bhutan. The valley houses one of the impressive ancient Buddhist monasteries in Bhutan known as Gangteng Monastery of the Nyingma sect in central Bhutan. The graceful black-necked cranes in Bhutan (Grus nigricollis) from the Tibetan Plateau visit the valley during the winter season to roost. On arrival in the Phobjikha Valley in the last week of October, the black-necked cranes circle the Gangteng Monastery three times and also repeat the process while returning to Tibet.