The Asian Common Toad (Duttaphrynus melanostictus) can fairly easy be identified by having a smooth skin on the top of its head and pronounced ridges above its eyes.

1st photo: Kerobokan area, Bali, Indonesia, 9 October 2011
2nd photo: Kerobokan area, Bali, Indonesia, 13 October 2011
3rd photo: Pemuteran area, Bali, Indonesia, 23 October 2011