Endangered
7 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Rakwana Round-Eyed Gecko | — | — | Cnemaspis pulchra | EN | — | |
| Rakwana Whipping Frog | — | — | Taruga fastigo | EN | Endemic | |
| Rasboroides pallidus | — | — | Rasboroides pallidus | EN | — | |
| Red Slender Loris | රත් උණහපුළුවා | சிவப்புத் தேவாங்கு | Loris tardigradus | EN | Endemic | |
| Red-Finned Barb | — | — | Pethia reval | EN | Endemic | |
| Reticulate Whipray | — | — | Himantura uarnak | EN | — | |
| Rhino-horned Lizard | අං කටුස්සා | காண்டாமிருகக் கொம்புப் பல்லி | Ceratophora stoddartii | EN | Endemic |
