Orthetrum is a genus of dragonflies in the Libellulidae family. It is a very large genus, spread across the Old World.
Khoo Teck Phuat Hospital, Singapaore 20120403.
Zoomed macro photo at dusk. Hmmm no white tail 🙂
The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in the world.