These birds are named Thrung Trung Karmo in Bhutan, and are the subject of Bhutanese songs, art, and folklore. They are an endangered species, and migrate from Tibet in late autumn, typically staying in Bhutan until mid-March. About 300-400 cranes reside in the wetland in the center of the valley. The Observation & Education Centre has informative displays about the cranes and the conservation efforts in the valley.