Opisthotropis typicaOpisthotropis typica, the olive mountain keelback, is a species of natricine snake found in the Philippines,Indonesia, and Malaysia.HabitatThey inhabit forests, particularly subtropical/tropical moist lowland forest, and wetlands, such as permanent rivers, streams, or creeks including waterfalls.NatureThey are active during the night. They reproduce through production of eggs that have membranes and/or shells.