Alcalus baluensis is a species of frog in the family Ceratobatrachidae. It is endemic to northern and western Borneo. Its common name is Balu eastern frog or dwarf mountain frog. It was placed in the family Dicroglossidae before being transferred to Ceratobatrachidae in 2015. Description Alcalus baluensis are small but stocky frogs. They typically measure in snout–vent length. Tympanic ring is visible. Habitat and conservation Its natural habitats are lowland and mid-elevation primary rainforests. It occurs on the forest floor in leaf litter and along stream banks. It is threatened by habitat loss. References baluensis Endemic fauna of Borneo Amphibians of Brunei Amphibians of Indonesia Amphibians of Malaysia Amphibians described in 1896 Taxa named by George Albert Boulenger Taxonomy articles created by Polbot Amphibians of Borneo