Brown-headed gulls in the Lhalu Wetland, a national nature reserve in Lhasa, photo from Tibet Daily, April 1.

Being an urban natural wetland with the highest altitude and largest acreage in the world, the Lhalu Wetland as China's unique urban natural inland wetland has improved its conditions as the government has allocated enough fund and launched efficient measures. Wild birds such as brown-headed gulls, ruddy shelducks and bar-headed geese come here and even black-necked crane as the national first-class protection animal can be seen in Lhalu Wetland.