Common Flying Dragon (Draco volans) on Bridge Rail, Sungei Buloh Wetland Reserve, Singapore
Unfortunately I didn't get to see it spread its "wings", but it posed for me nicely nonetheless. Draco lizards have elongated ribs that spread out horizontally to form wings. It's also known as the Common Gliding Lizard, and it uses its "wings" to glide from tree to tree as a form of travel. You can tell this is a female from its bluish dewlap (neck skin).