Least concern
989 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Rain Quail | — | கருநெஞ்சுக்காடை | Coturnix coromandelica | LC | — | |
| Rainbow Runner | — | கிறிச்சடை | Elagatis bipinnulata | LC | — | |
| Rainbow Trout | — | — | Oncorhynchus mykiss | LC | — | |
| Red Emperor Snapper | — | — | Lutjanus sebae | LC | — | |
| Red Junglefowl | — | சிவப்புக் காட்டுக்கோழி | Gallus gallus | LC | — | |
| Red Pinjalo | — | — | Pinjalo lewisi | LC | — | |
| Red Sea Whitespotted Moray | — | — | Gymnothorax punctatus | LC | — | |
| Red Squirrelfish | — | முண்டக்கண்ணி | Sargocentron rubrum | LC | — | |
| Red-Backed Flameback | — | — | Dinopium psarodes | LC | Endemic | |
| Red-Billed Tropicbird | — | — | Phaethon aethereus | LC | — | |
| Red-Naped Ibis | — | கரிய அரிவாள் மூக்கன் | Pseudibis papillosa | LC | — | |
| Red-Necked Phalarope | — | செங்கழுத்து உள்ளான் | Phalaropus lobatus | LC | — | |
| Red-Tailed Butterflyfish | — | — | Chaetodon collare | LC | — | |
| Red-Vented Bulbul | — | செங்குதக் கொண்டைக்குருவி | Pycnonotus cafer | LC | — | |
| Redbreast Tilapia | — | — | Coptodon rendalli | LC | — | |
| Redlip Parrotfish | — | — | Scarus rubroviolaceus | LC | — | |
| Redmouth Grouper | — | — | Aethaloperca rogaa | LC | — | |
| Redside Barb | — | — | Plesiopuntius bimaculatus | LC | — | |
| Redspot Emperor | — | — | Lethrinus lentjan | LC | — | |
| Redtooth Triggerfish | — | — | Odonus niger | LC | — | |
| Regal Demoiselle | — | — | Neopomacentrus cyanomos | LC | — | |
| Restless Demon | — | — | Indothemis limbata | LC | — | |
| Reticulated Puffer | — | — | Arothron reticularis | LC | — | |
| Rhomboid Ponyfish | — | — | Gazza rhombea | LC | — | |
| Richard’s Pipit | — | ரிச்சர்டு நெட்டைக்காலி | Anthus richardi | LC | — | |
| Ringtail Cardinalfish | — | — | Ostorhinchus aureus | LC | — | |
| Rippled Rockskipper | — | — | Istiblennius edentulus | LC | — | |
| Risso’s Dolphin | — | கண்டா ஓங்கல் | Grampus griseus | LC | — | |
| Rock Pigeon | — | மாடப்புறா | Columba livia | LC | — | |
| Rockmover Wrasse | — | — | Novaculichthys taeniourus | LC | — | |
| Rohan’s Globular Frog | — | உபெரோடான் ரோகானி | Uperodon rohani | LC | Endemic | |
| Rohu | — | ரோகு மீன் | Labeo rohita | LC | — | |
| Rose-Ringed Parakeet | — | பச்சைக்கிளி | Psittacula krameri | LC | — | |
| Rosy Snapper | — | — | Pristipomoides filamentosus | LC | — | |
| Rosy Starling | — | சூறைக்குருவி | Pastor roseus | LC | — | |
| Rosy Threadfin Bream | — | — | Nemipterus furcosus | LC | — | |
| Round Batfish | — | — | Platax orbicularis | LC | — | |
| Roundhead Parrotfish | — | — | Chlorurus strongylocephalus | LC | — | |
| Rubble Eviota | — | — | Eviota prasina | LC | — | |
| Ruddy Shelduck | — | சிவப்புத்தாரா | Tadorna ferruginea | LC | — | |
| Ruddy-Breasted Crake | — | செம்மார்புக் கானாங்கோழி | Zapornia fusca | LC | — | |
| Ruff | — | பேதை உள்ளான் | Calidris pugnax | LC | — | |
| Rufous Marsh Glider | — | — | Rhodothemis rufa | LC | — | |
| Rufous Woodpecker | — | கருஞ்சிவப்பு மரங்கொத்தி | Micropternus brachyurus | LC | — | |
| Rufous-Tailed Rock-Thrush | — | — | Monticola saxatilis | LC | — | |
| Russell’s Viper | තිත් පොළඟා | கண்ணாடி விரியன் | Daboia russelii | LC | — | |
| Russell’s Wolf Snake | — | ஓடுகாலிப்பாம்பு | Lycodon fasciolatus | LC | — | |
| Sabre Squirrelfish | — | — | Sargocentron spiniferum | LC | — |
