- Razorbill
- Red-bellied Woodpecker
- Red-billed Pigeon
- Red-billed Streamertail
- Red-breasted Merganser
- Red-breasted Nuthatch
- Red-eyed Vireo
- Red-headed Woodpecker
- Red-necked Grebe
- Red-necked Phalarope
- Red-shouldered Hawk
- Red-tailed Hawk
- Red-throated Loon
- Red-winged Blackbird
- Red Fox Sparrow
- Reddish Egret
- Redhead
- Ring-billed Gull
- Ring-necked Duck
- Ringed Teal
- Rock Dove
- Rose-breasted Grosbeak
- Roseate Spoonbill
- Ross's Goose
- Rough-legged Buzzard
- Ruby-crowned Kinglet
- Ruby-throated Hummingbird
- Ruddy Duck
- Ruddy Turnstone
- Rufous Hummingbird