Egrets rest on a tree near the Xitang River in Ningbo, East China's Zhejiang province. Stretching about 12 kilometers, the Xitang River starts from Gaoqiao town and ends at the Ximen sub-district of Ningbo. [Photo/cnnb.com.cn]

Egrets forage in the Xitang River in Ningbo, East China's Zhejiang province. [Photo/cnnb.com.cn]

An egret flies over the Xitang River in Ningbo, East China's Zhejiang province. [Photo/cnnb.com.cn]

An egret flies over the Xitang River in Ningbo, East China's Zhejiang province. [Photo/cnnb.com.cn]