![Aerial photo taken on Feb. 21, 2019 shows a heart-shaped island which is the habitat of various bird species at Bihu ecological park in Zhangzhou, southeast China\'s Fujian Province. (Xinhua/Jiang Kehong)](http://www.ecns.cn/hd/2019/02/23/45798f5245fc46e5963f87abfeec7673.jpg)
Aerial photo taken on Feb. 21, 2019 shows a heart-shaped island which is the habitat of various bird species at Bihu ecological park in Zhangzhou, southeast China's Fujian Province. (Xinhua/Jiang Kehong)
![Waterfowl cruise on a lake at Bihu ecological park in Zhangzhou, southeast China\'s Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)](http://www.ecns.cn/hd/2019/02/23/5b460a518034441fb7bdedad176226fd.jpg)
Waterfowl cruise on a lake at Bihu ecological park in Zhangzhou, southeast China's Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)
![Egrets fly over trees at Bihu ecological park in Zhangzhou, southeast China\'s Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)](http://www.ecns.cn/hd/2019/02/23/f82440d3483c409ab6d89c3d32c94fa4.jpg)
Egrets fly over trees at Bihu ecological park in Zhangzhou, southeast China's Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)
![Egrets fly over trees at Bihu ecological park in Zhangzhou, southeast China\'s Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)](http://www.ecns.cn/hd/2019/02/23/39dac425b5024f0ea0f2d7fe432d41c0.jpg)
Egrets fly over trees at Bihu ecological park in Zhangzhou, southeast China's Fujian Province, Feb. 21, 2019. (Xinhua/Jiang Kehong)