A number of migratory bird species have been spotted in the national natural reserve on the west side of Dongting Lake in Hanshou county, Hunan province. [Photo by Zhou Guohua/For chinadaily.com.cn] ...

Crested ibises soar over a field in Yangxian, a county in Shaanxi Province, on January 28. [Photo/Xinhua] During the Beijing summer, people used to see and hear flocks of Beijing swifts circling ...