Photo shows early spring scenery of the Dzongyab Lukhang (also known as Naga King) Park in Lhasa, capital city of southwest China`s Tibet. As spring is coming, the park has increasingly seen a variety of wild birds such as increasing number of wild birds such as Bar-headed Goose, Ruddy Shelducks and Black-headed Gulls. (Photo/China Tibet Online)

Photo shows early spring scenery of the Dzongyab Lukhang (also known as Naga King) Park in Lhasa, capital city of southwest China`s Tibet. As spring is coming, the park has increasingly seen a variety of wild birds such as increasing number of wild birds such as Bar-headed Goose, Ruddy Shelducks and Black-headed Gulls. (Photo/China Tibet Online)

Photo shows early spring scenery of the Dzongyab Lukhang (also known as Naga King) Park in Lhasa, capital city of southwest China`s Tibet. As spring is coming, the park has increasingly seen a variety of wild birds such as increasing number of wild birds such as Bar-headed Goose, Ruddy Shelducks and Black-headed Gulls. (Photo/China Tibet Online)

Photo shows early spring scenery of the Dzongyab Lukhang (also known as Naga King) Park in Lhasa, capital city of southwest China`s Tibet. As spring is coming, the park has increasingly seen a variety of wild birds such as increasing number of wild birds such as Bar-headed Goose, Ruddy Shelducks and Black-headed Gulls. (Photo/China Tibet Online)

Photo shows early spring scenery of the Dzongyab Lukhang (also known as Naga King) Park in Lhasa, capital city of southwest China`s Tibet. As spring is coming, the park has increasingly seen a variety of wild birds such as increasing number of wild birds such as Bar-headed Goose, Ruddy Shelducks and Black-headed Gulls. (Photo/China Tibet Online)