- Radde's Warbler
- Razorbill
- Red-and-green Macaw
- Red-billed Blue Magpie
- Red-billed Chough
- Red-billed Leiothrix
- Red-billed Oxpecker
- Red-billed Quelea
- Red-billed Spurfowl
- Red-billed Starling
- Red-billed Teal
- Red-billed Tropicbird
- Red-breasted Flycatcher
- Red-breasted Merganser
- Red-breasted Toucan
- Red-capped Cardinal
- Red-capped Lark
- Red-capped Robin-Chat
- Red-crested Cardinal
- Red-crested Cotinga
- Red-crested Korhaan
- Red-crested Pochard
- Red-eyed Dove
- Red-eyed Vireo
- Red-faced Mousebird
- Red-faced Spinetail
- Red-flanked Bluetail
- Red-footed Falcon
- Red-fronted Coot
- Red-gartered Coot
- Red-headed Finch
- Red-knobbed Coot
- Red-legged Cormorant
- Red-legged Honeycreeper
- Red-legged Partridge
- Red-legged Thrush
- Red-lored Amazon
- Red-necked Phalarope
- Red-necked Tanager
- Red-rumped Cacique
- Red-rumped Wheatear
- Red-tailed Comet
- Red-throated Loon
- Red-vented Bulbul
- Red-wattled Lapwing
- Red-whiskered Bulbul
- Red-winged Starling
- Red Collared Dove
- Red Junglefowl
- Red Kite
- Red Pileated Finch
- Reddish Egret
- Reddish Hermit
- Redwing
- Resplendent Quetzal
- Restinga Tyrannulet
- Richard's Pipit
- Ring-billed Gull
- Ring-necked Dove
- Ring Ouzel
- Ringed Kingfisher
- River Warbler
- Riverbank Warbler
- Rivoli's Hummingbird
- Roadside Hawk
- Rock-loving Cisticola
- Rock Kestrel
- Rock Ptarmigan
- Rose-ringed Parakeet
- Rose-throated Becard
- Roseate Spoonbill
- Ross's Gull
- Rosy Starling
- Royal Tern
- Ruby-crowned Tanager
- Ruddy Ground Dove
- Ruddy Shelduck
- Ruddy Turnstone
- Rufescent Screech Owl
- Rufescent Tiger Heron
- Ruff
- Rufous-banded Miner
- Rufous-bellied Bush Tyrant
- Rufous-bellied Seedsnipe
- Rufous-bellied Thrush
- Rufous-booted Racket-tail
- Rufous-breasted Chat-Tyrant
- Rufous-breasted Hermit
- Rufous-capped Antthrush
- Rufous-capped Babbler
- Rufous-capped Spinetail
- Rufous-capped Thornbill
- Rufous-collared Sparrow
- Rufous-crested Coquette
- Rufous-crowned Greenlet
- Rufous-crowned Tody-Flycatcher
- Rufous-faced Warbler
- Rufous-headed Chachalaca
- Rufous-headed Tanager
- Rufous-margined Antwren
- Rufous-naped Ground Tyrant
- Rufous-necked Wood Rail
- Rufous-tailed Attila
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Robin
- Rufous-tailed Scrub Robin
- Rufous Gnateater
- Rufous Hornero
- Rufous Treepie
- Rufous Wren
- Rüppell's Korhaan
- Rüppell's Warbler
- Russet-backed Oropendola
- Rust-and-yellow Tanager
- Rustic Bunting
- Rusty-fronted Canastero