Boophis williamsi is a species of frog in the family Mantellidae endemic to Madagascar. Its natural habitats are subtropical or tropical moist montane forests, subtropical or tropical high-altitude grassland, rivers, and heavily degraded former forests. It is threatened by habitat loss. References Sources williamsi Endemic frogs of Madagascar Taxa named by Jean Marius René Guibé Amphibians described in 1974 Taxonomy articles created by Polbot