- Razorbill
- Red-backed Shrike
- Red-breasted Merganser
- Red-breasted Nuthatch
- Red-crested Pochard
- Red-eyed Vireo
- Red-footed Falcon
- Red-legged Partridge
- Red-legged Thrush
- Red-necked Phalarope
- Red-rumped Swallow
- Red-tailed Hawk
- Red-throated Loon
- Red-winged Blackbird
- Red Crossbill
- Red Fox Sparrow
- Red Kite
- Red Phalarope
- Redwing
- Richard's Pipit
- Ring-billed Gull
- Rock Dove
- Rock Sparrow
- Rook
- Rose-breasted Grosbeak
- Rose-ringed Parakeet
- Rosy-faced Lovebird
- Rosy Starling
- Royal Tern
- Ruby-crowned Kinglet
- Ruby-throated Hummingbird
- Ruddy Shelduck
- Ruddy Turnstone
- Ruff
- Ruffed Grouse
- Rusty Blackbird