Phobjikha Valley got mains electricity only in 2010, and every cable was laid underground, because overhead wires would have killed the cranes that winter on its floor. Black-necked cranes cross the Himalaya from the Tibetan Plateau in late October, and about 650 of them spent the winter of 2024-25 here — the highest number the Royal Society for Protection of Nature has ever counted, and most of Bhutan's entire flock. What holds them is the shape of the ground. Bhutan's rivers cut narrow V-shaped gorges, but Phobjikha is a broad, flat-bottomed glacial trough at around 3,000 metres, and its marshy floor grows a dwarf bamboo, Yushania microphylla, whose rhizomes the birds dig up all winter. Bhutanese Buddhism treats the cranes as sacred, and the story goes that they circle Gangtey Monastery three times before landing, then circle it again when they leave in February.
Gangtey Goenpa, founded in 1613 by a grandson of the treasure-revealer Pema Lingpa, is the largest Nyingma monastery in the country; it stands on a forested spur above the grassland, its gold roof visible far across the valley. Every 11 November its courtyard fills for the Black-Necked Crane Festival, where schoolchildren in white costumes bow and flap their way through a crane dance. The rest of the year this is working farmland: seed potatoes are the cash crop, and yaks, horses and cattle graze the marsh beside the birds. Walking the flat trails at dawn, with mist on the grass and cranes calling across the wetland, gives a stillness Bhutan's steeper valleys don't offer. The valley has been a protected conservation area since 2003 and a Ramsar wetland since 2014, with new construction limited; by mid-February the cranes are gone north, and a summer visit means green marsh, grazing herds and no birds.