Cave racer snake - Orthriophis taeniura ridleyi also called Elaphe taeniura ridleyi (Borneo)
It seems that it is also called Cave Dwelling Rat snake.
If you know which is the preferred denomination for this snake, please post a comment.
The cave racer (Elaphe taeniura) is the only snake which is adapted to spend its whole life in a cave, feeding exclusively on bats and swiftlets. It is non-venomous.
Spotted in Lang Cave, in Gunung Mulu National Park (Borneo)