Metaphrynella sundana (Borneo treefrog or Bornean tree hole frog) is a species of frog in the family Microhylidae. It is endemic to Borneo and found in Brunei, Indonesia, and Malaysia. Description Metaphrynella sundana are small frogs; adults measure up to about in snout–vent length. The body is stocky and the limbs are moderately short. Skin has rounded tubercles that are larger on the sides. Colouration and texture show considerable variation. The male has a median subgular vocal sac. Males call at night from tree holes that are about meters above the ground. Males are able to adjust their call to the resonance frequency of the tree hole they call from. Habitat and conservation The species' natural habitats are lowland primary rainforests to about asl. It is a common frog in primary and secondary rainforests. Reproduction takes place in tree holes with water. It is threatened by habitat loss from clear-cutting. References External links Sound recordings of Metaphrynella sundana at BioAcoustica Metaphrynella Endemic fauna of Borneo Amphibians of Brunei Amphibians of Indonesia Amphibians of Malaysia Amphibians described in 1867 Taxa named by Wilhelm Peters Taxonomy articles created by Polbot Amphibians of Borneo