At night, the Mulu rainforest is filled with an wonderful chorus of insect call. The Bornean rainforest is home to many nocturnal creatures and if you tread carefully and remain very quiet and patient, you might get to see some of them. During our expedition last spring we got to see a few whilst hiking to and from the caves where we were mostly working. We spotted several species of tree frog (Collet's Tree Frog, Polypedates colletti) clinging to the vines of small trees in search of food. These frogs mainly feed on worms, insects and other small bugs.