Polypedates colletti Boulenger 1890
The Hourglass Bush Frog, Collett's Tree Frog
This is a tree frog from Sumatra, Kalimantan and the Natuna Islands. Most specimens have a "hourglass" or X-shaped marking on their backs but some are plain light brown while some can be beautiful pink with white "marble" spots.
Getting ready to jump onto the camera!