I have the book "A photographic guide to the Dragonflies of Singapore" and I looked through it to see if I could identify these dragonflies and damselflies I saw at Bukit Batok Nature Park this morning. At the end of my browsing I think it is best that I just refer to them in broad categories i.e. dragonfly and damselfly. In this set of photos, the blue-coloured, ones with the elongated bodies are the damselflies. The rest which are bigger are dragonflies.