Polypedates otilophus (File-eared Tree Frog) is a large tree frog, with a saw-edged bony ridge over the eardrum. It has a triangular head with a protruding, sharp point at the angle of the jaw. The toes are only half-webbed. The skin is smooth, except for a pointed projection at the heel and a smaller one at the elbow. This species is tan or yellowish colour with thin dark lines running down the back and head. The rear of the thigh is marked with eight to twelve bold black bars on a white background while the underside is a dirty white. It inhabits both primary and disturbed forests and also can be found in tree plantation from near sea level to 1100 m. It is known from Kalimantan, Sabah and Sarawak but it also occurs on Sumatra. The adults feed on a variety of insects, especially on large tree crickets. Furthermore, this frog has a distinctive, musty stench, which most people find unpleasant. (Inger & Stuebing, 2005).