Photo taken on November 2 shows hundreds of swans hovering over the Sand Lake in Ningxia Hui Autonomous Region. There are 178 species of birds belonging to 44 families and 17 orders living on the bird island and the surrounding areas of Sand Lake. Being an ideal habitat for millions of migrant birds, the site boasts goosander, ern, bustard, black stork and other rare birds under first-class state protection. [Photo/nxnews.net]