Real Dragons Live In Indonesia

I met this 'creature' many times in my childhood, even until now, I can still find it in my hometown in Yogyakarta, Indonesia. I never realized that it attracts scientists' attention so much. This animal flies from trees to trees and climbs up at it with incredible speed. I am not sure of the scientific name for this animal, in my village, it is called Cleret Gombel. It does look like a dragon without the fire blow coming from its mouth :p Enjoy!