| Common Name | Scientific name |
|---|---|
| Rose-throated Becard | Pachyramphus aglaiae |
| Rose-throated Tanager | Piranga roseogularis |
| Roseate Spoonbill | Platalea ajaja |
| Roseate Tern | Sterna dougallii |
| Ross's Goose | Anser rossii |
| Ross's Goose | Chen rossii |
| Ross's Gull | Rhodostethia rosea |
| Rosy Starling | Pastor roseus |
| Rosy Thrush-Tanager | Rhodinocichla rosea |
| Rosy-billed Pochard | Netta peposaca |
| Rosy-faced Lovebird | Agapornis roseicollis |
| Rough-legged Buzzard | Buteo lagopus |
| Rough-legged Tyrannulet | Phyllomyias burmeisteri |
| Royal Flycatcher | Onychorhynchus coronatus |
| Royal Tern | Thalasseus maximus |
| Ruby-crowned Kinglet | Regulus calendula |
| Ruby-throated Hummingbird | Archilochus colubris |
| Ruby-topaz Hummingbird | Chrysolampis mosquitus |
| Ruddy Crake | Laterallus ruber |
| Ruddy Duck | Oxyura jamaicensis |
| Ruddy Foliage-gleaner | Clibanornis rubiginosus |
| Ruddy Ground-Dove | Columbina talpacoti |
| Ruddy Pigeon | Patagioenas subvinacea |
| Ruddy Quail-Dove | Geotrygon montana |
| Ruddy Shelduck | Tadorna ferruginea |
RingBase adheres to EURING codes.
