A common flangetail (ictinogomphus pertinax, 霸王叶春蜓), with its glaive-like tail, from the lily pond at Xianjia Lake (咸嘉湖): my favourite local dragonfly. They are common here in the summer, and they frequent the edges of still waters, which is convenient for close observation. But if they are more pertinacious (pertinax) than other dragonflies, I have not noticed it.
