| View | Alca torda | Razorbill | |
| View | Loxia curvirostra | Red Crossbill | |
| View | Calidris canutus | Red Knot | |
| View | Phalaropus fulicarius | Red Phalarope | |
| View | Melanerpes carolinus | Red-bellied Woodpecker | |
| View | Phaethon aethereus | Red-billed Tropicbird | |
| View | Mergus serrator | Red-breasted Merganser | |
| View | Sitta canadensis | Red-breasted Nuthatch | |
| View | Dryobates borealis | Red-cockaded Woodpecker | |
| View | Vireo olivaceus | Red-eyed Vireo | |
| View | Sula sula | Red-footed Booby | |
| View | Melanerpes erythrocephalus | Red-headed Woodpecker | |
| View | Podiceps grisegena | Red-necked Grebe | |
| View | Phalaropus lobatus | Red-necked Phalarope | |
| View | Buteo lineatus | Red-shouldered Hawk | |
| View | Buteo jamaicensis | Red-tailed Hawk | |
| View | Gavia stellata | Red-throated Loon | |
| View | Agelaius phoeniceus | Red-winged Blackbird | |
| View | Egretta rufescens | Reddish Egret | |
| View | Aythya americana | Redhead | |
| View | Acanthis flammea | Redpoll | |
| View | Larus delawarensis | Ring-billed Gull | |
| View | Aythya collaris | Ring-necked Duck | |
| View | Phasianus colchicus | Ring-necked Pheasant | |
| View | Columba livia | Rock Pigeon | |
| View | Pheucticus ludovicianus | Rose-breasted Grosbeak | |
| View | Platalea ajaja | Roseate Spoonbill | |
| View | Sterna dougallii | Roseate Tern | |
| View | Anser rossii | Ross's Goose | |
| View | Buteo lagopus | Rough-legged Hawk | |
| View | Thalasseus maximus | Royal Tern | |
| View | Corthylio calendula | Ruby-crowned Kinglet | |
| View | Archilochus colubris | Ruby-throated Hummingbird | |
| View | Oxyura jamaicensis | Ruddy Duck | |
| View | Arenaria interpres | Ruddy Turnstone | |
| View | Calidris pugnax | Ruff | |
| View | Bonasa umbellus | Ruffed Grouse | |
| View | Selasphorus rufus | Rufous Hummingbird | |
| View | Euphagus carolinus | Rusty Blackbird |