Hu Weining (L), a bird photographer, shows his pictures to children at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Children and their parents use binocles to watch birds at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Children use binocles to watch birds at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Lin Tiantian (L), team leader of a bird-watching group, takes records of birds her team members observed at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Children use binocles to watch birds at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Lin Chen (L), a veteran bird watcher, introduces bird-watching knowledge to children and their parents at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

Local residents attend a bird-watching activity at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)

A little girl uses binocle to watch birds at Wushan Park in Fuzhou, capital of southeast China's Fujian Province, March 23, 2014. The provincial bird watching society conducted an bird survey activity for local youth here Sunday. The monthly activity, which is held regularly since 2013, is aimed to popularize knowledge related with birds. (Xinhua/Jiang Kehong)