Slender Skimmer (Orthetrum sabina, 狭腹灰蜻).
A species of orthetrum ranging from south-east Europe to Australia, it has clearly adapted to a variety of different environments. In summer, there are often a few around the local lakes; towards the end of summer they are easy to find around Yuelu Mountain and in the nearby forests, wherever there are ponds or pools of water--and often vigorously chasing away other species of dragonflies!
