- Red-bellied Woodpecker
- Red-breasted Merganser
- Red-breasted Nuthatch
- Red-breasted Sapsucker
- Red-eyed Vireo
- Red-headed Woodpecker
- Red-naped Sapsucker
- Red-necked Grebe
- Red-necked Phalarope
- Red-shouldered Hawk
- Red-tailed Hawk
- Red-whiskered Bulbul
- Red-winged Blackbird
- Red Fox Sparrow
- Red Tanager
- Reddish Egret
- Redhead
- Ring-billed Gull
- Ring-necked Duck
- Rivoli's Hummingbird
- Rock Dove
- Rock Wren
- Rose-breasted Grosbeak
- Roseate Spoonbill
- Ross's Goose
- Rosy-faced Lovebird
- Ruby-crowned Kinglet
- Ruby-throated Hummingbird
- Ruddy Duck
- Ruddy Ground Dove
- Ruddy Turnstone
- Rufescent Tiger Heron
- Rufous-backed Thrush
- Rufous-collared Sparrow
- Rufous-crowned Sparrow
- Rufous-winged Sparrow
- Rufous Hummingbird
- Rusty-crowned Tit-Spinetail
- Rusty-margined Flycatcher
- Rusty Blackbird