It is also a swan of superlatives. With a population of about 180,000, the whooper, though vulnerable to loss of habitat, is among the most abundant of swans and trumps others in the sweep of its ...

Young whooper swans practice flying in Rongcheng, Shandong province, to prepare for their upcoming long-distance migration. [Photo by Li Xinjun/For chinadaily.com.cn] Young whooper swans have ...