Grey herons seen in NW China's Shaanxi(1/5)

Grey herons rest on a tree during sunset in Zhouwan Village of Shipo Township in Luonan County, northwest China's Shaanxi Province, June 18, 2019. (Xinhua/Tao Ming)

A grey heron flies back to its nest on a tree in Zhouwan Village of Shipo Township in Luonan County, northwest China's Shaanxi Province, June 18, 2019. (Xinhua/Tao Ming)

Grey herons rest on a tree in Zhouwan Village of Shipo Township in Luonan County, northwest China's Shaanxi Province, June 18, 2019. (Xinhua/Tao Ming)

Grey herons rest on a tree in Zhouwan Village of Shipo Township in Luonan County, northwest China's Shaanxi Province, June 18, 2019. (Xinhua/Tao Ming)

Grey herons sit on branches of tree in Zhouwan Village of Shipo Township in Luonan County, northwest China's Shaanxi Province, June 18, 2019. (Xinhua/Wang Pei)