It is endemic to Borneo where it is widespread and found in Brunei, Indonesia, and Malaysia,[2] typically in the lowlands but sometimes as high as 1,100 m (3,600 ft) above sea level.

[3] This species has prominent, sharp ridges behind the eye, above the ear, referred to in its names.

[5] The tadpoles are yellowish green above and white below, acquiring the stripes seen in adults well before metamorphosis.

[3] Polypedates otilophus typically occurs in secondary habitats, at the edges of primary forest, and also in villages.

[5] They are most easily spotted at suitable breeding ponds where adults perch on vegetation 1–4 m above the ground.