![](http://www.ecns.cn/hd/2019/06/19/3cacb4e4a33047c0ad71c4728a071800.jpg)
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)
![](http://www.ecns.cn/hd/2019/06/19/573c7ec83ea44ba399ce90b21c41095d.jpg)
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)
![](http://www.ecns.cn/hd/2019/06/19/7d8c718581f14cfda97f20aca18053cb.jpg)
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)
![](http://www.ecns.cn/hd/2019/06/19/95601a3780404c849eadbdd43fec3988.jpg)
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)
![](http://www.ecns.cn/hd/2019/06/19/b3ef6d46f67c449f85e450add61f9609.jpg)
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)