Karin Bubble-nest Frog

This is a small frog species. Males measure up to 23 mm (0.91 in) in snout-vent length, although modern sources give range 18–21 mm (0.71–0.83 in) for SVL. They have a rounded snout and hidden tympanum. The fingers and toes short and bear adhesive discs; fingers are free from webbing but toes are slightly webbed at their base. The back is greyish or brown. A dark bar or triangular blotch between the eyes and curved dark band the sides may be present. The hind limbs have some crossbars. Males have a large vocal sac.

Raorchestes parvulus is typically found in evergreen forest, but it can also be found in grassland with heath forest. Individuals are mostly found in trees and dense vegetation, both away from water and near streams. The altitudinal range is 46–1,500 m (151–4,921 ft) above sea level. Males call from the vegetation. The development is believed to be direct. This species is probably suffering from habitat loss caused by logging and expanding agriculture and settlements. However, it is not considered threatened overall because of its wide distribution and presumed large total population. It is also documented from several protected areas and is likely present in many more.