A group of black storks play in the Mianman River in Jingxing County, North China’s Hebei Province,on Thursday. Known as the “giant panda of birds” because of its scarcity, the black stork is an endangered rare bird in the world and is on a special national protection list. With its efforts made to improve its ecological environment in recent years, Jingxing has attracted many rare birds to the county.   Xinhua