- Razorbill
- Red-and-green Macaw
- Red-backed Shrike
- Red-bellied Grackle
- Red-bellied Macaw
- Red-billed Chough
- Red-billed Firefinch
- Red-billed Oxpecker
- Red-billed Parrot
- Red-billed Pigeon
- Red-billed Quelea
- Red-billed Scythebill
- Red-billed Spurfowl
- Red-billed Teal
- Red-billed Tropicbird
- Red-breasted Goose
- Red-breasted Meadowlark
- Red-breasted Merganser
- Red-breasted Parakeet
- Red-breasted Swallow
- Red-capped Flowerpecker
- Red-cheeked Cordon-bleu
- Red-cheeked Parrot
- Red-chested Swallow
- Red-collared Myzomela
- Red-crested Cotinga
- Red-crested Korhaan
- Red-crested Pochard
- Red-crowned Crane
- Red-crowned Woodpecker
- Red-eyed Dove
- Red-faced Spinetail
- Red-fan Parrot
- Red-footed Booby
- Red-footed Falcon
- Red-headed Barbet
- Red-knobbed Coot
- Red-legged Honeycreeper
- Red-legged Partridge
- Red-legged Seriema
- Red-lored Amazon
- Red-naped Ibis
- Red-necked Buzzard
- Red-necked Nightjar
- Red-necked Phalarope
- Red-necked Woodpecker
- Red-ruffed Fruitcrow
- Red-rumped Bush Tyrant
- Red-rumped Cacique
- Red-rumped Wheatear
- Red-rumped Woodpecker
- Red-shouldered Cuckooshrike
- Red-tailed Wheatear
- Red-throated Bee-eater
- Red-throated Caracara
- Red-throated Loon
- Red-vented Bulbul
- Red-wattled Lapwing
- Red-winged Blackbird
- Red-winged Tinamou
- Red Bird-of-paradise
- Red Crossbill
- Red Junglefowl
- Red Kite
- Red Knot
- Red Phalarope
- Red Pileated Finch
- Reddish Egret
- Redpoll
- Redwing
- Reed Cormorant
- Reeves's Pheasant
- Resplendent Quetzal
- Reunion Olive White-eye
- Reunion Stonechat
- Ring-billed Gull
- Ring-necked Duck
- Ringed Kingfisher
- Ringed Woodpecker
- River Lapwing
- Rivoli's Hummingbird
- Roadside Hawk
- Rock Bunting
- Rock Dove
- Rock Ptarmigan
- Rock Shag
- Rock Sparrow
- Rock Wren
- Rose-bellied Bunting
- Rose-breasted Grosbeak
- Rose-ringed Parakeet
- Rose-throated Becard
- Roseate Spoonbill
- Rosy-faced Lovebird
- Rosy Minivet
- Royal Tern
- Ruby-crowned Kinglet
- Ruby-throated Hummingbird
- Ruddy-breasted Seedeater
- Ruddy Duck
- Ruddy Ground Dove
- Ruddy Pigeon
- Ruddy Quail-Dove
- Ruddy Shelduck
- Ruddy Treerunner
- Ruddy Turnstone
- Rufescent Tiger Heron
- Ruff
- Rufous-backed Thrush
- Rufous-backed Wren
- Rufous-bellied Kookaburra
- Rufous-bellied Thrush
- Rufous-breasted Chat-Tyrant
- Rufous-breasted Hermit
- Rufous-collared Sparrow
- Rufous-gaped Hillstar
- Rufous-sided Scrub Tyrant
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Scrub Robin
- Rufous-winged Woodpecker
- Rufous Hornero
- Rufous Motmot
- Rüppell's Vulture
- Rüppell's Weaver
- Russet-backed Oropendola
- Russet-crowned Motmot
- Russet-crowned Warbler
- Russet-throated Puffbird
- Rusty-backed Spinetail
- Rusty-margined Flycatcher
- Rusty Flowerpiercer
- Rusty Sparrow