A night heron is released to the nature in Ningbo, a port city in east China's Zhengjiang Province, March 21, 2009. A number of birds saved by the Ningbo wildlife rescue center were released to the nature on March 21, the World Forest Day. An egret is released to the nature in Ningbo, a port city in east China’s Zhengjiang Province, March 21, 2009. A number of birds saved by the Ningbo wildlife rescue center were released to the nature on March 21, the World Forest Day.