Rana monjerai is a new species of frog that was found in Malaysia. This frog was discovered by a group of researcher from Universiti Sains Malaysia (USM) during the Forest Biodiversity Scientific Expedition of Gunung Jerai, Kedah which are organized by Forestry Department Peninsular Malaysia with in conjunction of Kedah Forestry Department in 2005.
The Rana monjerai is a medium-sized frog, with the female reaching 75mm and the male measuring between 38mm and 43mm in snout-vent length. This species was only known to exist on Gunung Jerai and can be found perched on rocks and sand along the mountain stream. This species are mostly found in streams that are clear, unpolluted and undisturbed. They can be considered as biological indicators for assessing the health of a river system or the environment as a whole.