During my trip with Wildland Adventures in the depths of the Danum Valley Conservation Area in Sabah, Malaysia there is a weather tower which overlooks the valleys and hills of this vast wilderness reserve. Where an early riser can go in the morning darkness to listen and watch as this ancient rainforest ecosystem slowly comes to life. First to announce the new day are the gibbons, beginning with a solitary whooping call that picks up intensity and echoes throughout the valley. The call is fervently joined by other family groups and every niche seems to rise from its nightly respite as the sun slowly creeps up and the mists that swirl through the immensely tall Dipterocarp forest lift. Just another day for the denizens of this forest world but an unforgettable and moving experience for anyone lucky enough to bear witness.