- Rattling Cisticola
- Razorbill
- Red-backed Shrike
- Red-billed Buffalo Weaver
- Red-billed Chough
- Red-billed Firefinch
- Red-billed Oxpecker
- Red-billed Parrot
- Red-billed Quelea
- Red-billed Scythebill
- Red-billed Teal
- Red-breasted Merganser
- Red-breasted Nuthatch
- Red-capped Lark
- Red-cheeked Cordon-bleu
- Red-crested Cardinal
- Red-crested Pochard
- Red-crowned Woodpecker
- Red-faced Mousebird
- Red-faced Spinetail
- Red-footed Falcon
- Red-headed Barbet
- Red-knobbed Coot
- Red-legged Honeycreeper
- Red-legged Partridge
- Red-legged Seriema
- Red-lored Amazon
- Red-necked Falcon
- Red-necked Grebe
- Red-stained Woodpecker
- Red-tailed Hawk
- Red-throated Loon
- Red-throated Piping Guan
- Red-vented Bulbul
- Red-whiskered Bulbul
- Red-winged Blackbird
- Red-winged Francolin
- Red Crossbill
- Red Fody
- Red Junglefowl
- Red Kite
- Red Knot
- Red Phalarope
- Redwing
- Reed Cormorant
- Resplendent Quetzal
- Ring-billed Gull
- Ring-necked Dove
- Ring Ouzel
- Ringed Kingfisher
- Rivoli's Hummingbird
- Roadside Hawk
- Rock Kestrel
- Rock Sparrow
- Rook
- Rose-ringed Parakeet
- Roseate Spoonbill
- Ross's Gull
- Rough-legged Buzzard
- Ruddy Ground Dove
- Ruddy Shelduck
- Ruddy Turnstone
- Rufescent Tiger Heron
- Ruff
- Rufous-backed Wren
- Rufous-bellied Thrush
- Rufous-breasted Antthrush
- Rufous-collared Sparrow
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Weaver
- Rufous-throated Tanager
- Rufous Casiornis
- Rufous Hornero
- Rufous Motmot
- Rufous Mourner
- Rufous Treepie
- Rüppell's Starling
- Russet-crowned Warbler
- Rusty-collared Seedeater