Gray-eyed Frog

Adult males measure 30–33 mm (1.2–1.3 in) in snout–vent length. The dorsal colouration is reddish-brown or orange to yellowish. In most individuals, there are two small, dark occipital spots. The ventral surfaces of the body and limbs are light yellow. The pupil is vertical and the iris light golden yellow. There is no visible tympanum. The skin is warty. The toe discs are expanded. Males have a large gular flap and a non-distensible vocal sac.

Its natural habitats are closed-canopy, undisturbed rainforests. It is an arboreal frog found high up in the foliage. It lays its eggs in a foam nest attached to leaves above slow-flowing streams—the only species to do so within the family Hyperoliidae. The tadpoles drop to the water after hatching. Opisthothylax immaculatus is a widespread species, but its population density is low. Habitat loss is probably a threat to it. It occurs in the Korup National Park in Cameroon, probably also in other protected areas.

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