Lhalu wetland in Lhasa

Photo taken on June 28, 2011 shows a butterfly at the Lhalu wetland in Lhasa, capital of southwest China's Tibet Autonomous Region. The Lhalu wetland locates in the north of the city of Lhasa and it covers an area of 12.2 square kilometers. More than 95 percent of the wetland is covered by trees and plants.[Photo/Xinhua]