![A blue-tailed bee eater is seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/855c8d1717094d99bba46ecf08e4c1ce.jpg)
A blue-tailed bee eater is seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![Blue-tailed bee eaters are seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/10dd94dbc2694d1f82719913d69d3421.jpg)
Blue-tailed bee eaters are seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![Blue-tailed bee eaters are seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/493c9f816d9046b195dc5f157bf0cfa4.jpg)
Blue-tailed bee eaters are seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![Blue-tailed bee eaters are seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/8d8079fc77e04d0fbb2241b36bacc6b5.jpg)
Blue-tailed bee eaters are seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![A blue-tailed bee eater is seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/80d54a1ddd264177b95e2f3a3753bd5a.jpg)
A blue-tailed bee eater is seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![A blue-tailed bee eater is seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/5ad9e85e4a9b4640bf3abb960416c759.jpg)
A blue-tailed bee eater is seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)
![A blue-tailed bee eater is seen in Haikou, south China\'s Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)](http://www.ecns.cn/hd/2019/05/16/9d792aadfbd74a18a1ed62f870d65093.jpg)
A blue-tailed bee eater is seen in Haikou, south China's Hainan Province, May 14, 2019. According to statistics from Haikou Duotan Wetlands Institute, nearly 200 blue-tailed bee eaters reside in Haikou. (Xinhua/Yang Guanyu)