- Razorbill
- Red-backed Shrike
- Red-bellied Grackle
- Red-bellied Macaw
- Red-bellied Woodpecker
- Red-billed Firefinch
- Red-billed Leiothrix
- Red-billed Pigeon
- Red-billed Quelea
- Red-billed Scythebill
- Red-billed Teal
- Red-billed Tropicbird
- Red-breasted Blackbird
- Red-breasted Nuthatch
- Red-breasted Parakeet
- Red-capped Cardinal
- Red-capped Lark
- Red-cheeked Cordon-bleu
- Red-chested Swallow
- Red-crested Pochard
- Red-crowned Woodpecker
- Red-eyed Vireo
- Red-faced Mousebird
- Red-flanked Bluetail
- Red-footed Booby
- Red-footed Falcon
- Red-headed Barbet
- Red-headed Bunting
- Red-headed Woodpecker
- Red-knobbed Coot
- Red-legged Honeycreeper
- Red-legged Partridge
- Red-lored Amazon
- Red-necked Falcon
- Red-necked Grebe
- Red-necked Woodpecker
- Red-rumped Cacique
- Red-rumped Swallow
- Red-rumped Woodpecker
- Red-shouldered Hawk
- Red-tailed Shrike
- Red-throated Ant Tanager
- Red-throated Bee-eater
- Red-throated Caracara
- Red-throated Loon
- Red-throated Pipit
- Red-whiskered Bulbul
- Red-winged Blackbird
- Red-winged Starling
- Red Collared Dove
- Red Crossbill
- Red Junglefowl
- Red Kite
- Red Phalarope
- Reddish Hermit
- Redwing
- Reed Cormorant
- Resplendent Quetzal
- Ring-billed Gull
- Ring-necked Dove
- Ring Ouzel
- Ringed Kingfisher
- River Warbler
- Rivoli's Hummingbird
- Roadside Hawk
- Rock Bunting
- Rock Kestrel
- Rock Martin
- Rook
- Rose-breasted Grosbeak
- Rose-ringed Parakeet
- Rose-throated Becard
- Roseate Spoonbill
- Roseate Tern
- Rosy Starling
- Rough-legged Buzzard
- Royal Tern
- Ruby-crowned Kinglet
- Ruby-throated Hummingbird
- Ruddy-breasted Seedeater
- Ruddy-capped Nightingale-Thrush
- Ruddy Crake
- Ruddy Ground Dove
- Ruddy Quail-Dove
- Ruddy Shelduck
- Ruddy Treerunner
- Ruddy Turnstone
- Ruff
- Rufous-backed Wren
- Rufous-breasted Chat-Tyrant
- Rufous-breasted Wren
- Rufous-browed Peppershrike
- Rufous-capped Warbler
- Rufous-collared Sparrow
- Rufous-collared Thrush
- Rufous-crowned Tody-Flycatcher
- Rufous-eared Warbler
- Rufous-headed Chachalaca
- Rufous-rumped Foliage-gleaner
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Scrub Robin
- Rufous-throated Tanager
- Rufous-winged Buzzard
- Rufous Motmot
- Rüppell's Vulture
- Rüppell's Warbler
- Russet-backed Oropendola
- Russet-crowned Warbler
- Russet-throated Puffbird
- Rusty-breasted Antpitta
- Rusty-margined Flycatcher
- Rusty Flowerpiercer
- Rusty Sparrow