Sri Lanka Rock Frog

The Sri Lanka rock frog, or Ceylon streamlined frog, is endemic to south, central and western Sri Lanka. Females grow to about 5 cm and males to about 4 cm. It is olive green or yellowish-brown, mottled with brown patches, with brown bars across the legs, and is well camouflaged on algae-covered rocks. It used to be placed in the family Ranidae but a DNA study put it in Dicroglossidae (Wikipedia, general species account).

It lives in wet forest up to 1,200 m, is largely aquatic, and occurs in fast mountain streams, under boulders and on wet rocks beside waterfalls. The female lays a cluster of eggs in a crevice in the splash zone, and the male guards several nests and keeps the eggs moist. The tadpoles feed on small invertebrates on rock surfaces and are semi-terrestrial. Nationally Endangered (Sri Lanka National Red List 2012).