Pristimantis fenestratus is a species of frog in the family Strabomantidae. It is found in the Amazon Basin of eastern Peru, north-eastern Bolivia, south-eastern Ecuador, south-eastern Colombia, and Brazil. Its common name is Rio Mamore robber frog, after Mamoré River, its type locality.[1] Its natural habitats are tropical humid montane and lowland forests; it can also occur in secondary forest and forest edges. It is very common in parts of its range.