Black-Necked Crane Festival
A Black-necked Crane festival is held every year in the premises of the Gangteng Monastery on 12 November to welcome the cranes, which start arriving in late October. The festival is attended by a large number of local people. On this occasion, children wearing crane costumes perform choreographed crane dances. During this period, cranes are seen flying at high altitudes over the mountains.
Information based on http://en.wikipedia.org/wiki/Black-necked_cranes_in_Bhutan