- Rachel's Malimbe
- Racket-tailed Coquette
- Radde's Warbler
- Radjah Shelduck
- Raggiana Bird-of-paradise
- Rail-babbler
- Rainbow Bee-eater
- Rainbow Lorikeet
- Rainbow Starfrontlet
- Ranongga White-eye
- Rattling Cisticola
- Razorbill
- Red-and-green Macaw
- Red-and-white Antpitta
- Red-and-yellow Barbet
- Red-backed Mousebird
- Red-backed Shrike
- Red-banded Flowerpecker
- Red-banded Fruiteater
- Red-bellied Fruit Dove
- Red-bellied Grackle
- Red-bellied Macaw
- Red-bellied Paradise Flycatcher
- Red-bellied Parrot
- Red-billed Blue Magpie
- Red-billed Buffalo Weaver
- Red-billed Chough
- Red-billed Dwarf Hornbill
- Red-billed Firefinch
- Red-billed Helmetshrike
- Red-billed Leiothrix
- Red-billed Oxpecker
- Red-billed Pied Tanager
- Red-billed Pigeon
- Red-billed Quelea
- Red-billed Scythebill
- Red-billed Teal
- Red-billed Tyrannulet
- Red-breasted Flycatcher
- Red-breasted Goose
- Red-breasted Merganser
- Red-breasted Nuthatch
- Red-breasted Pygmy Parrot
- Red-breasted Swallow
- Red-capped Cardinal
- Red-capped Crombec
- Red-capped Flowerpecker
- Red-capped Lark
- Red-capped Myzomela
- Red-capped Plover
- Red-capped Robin
- Red-capped Robin-Chat
- Red-cheeked Parrot
- Red-chested Cuckoo
- Red-chested Flowerpecker
- Red-chested Flufftail
- Red-chested Sunbird
- Red-chinned Lorikeet
- Red-collared Myzomela
- Red-cowled Cardinal
- Red-crested Cotinga
- Red-crested Korhaan
- Red-crested Pochard
- Red-crested Turaco
- Red-crowned Crane
- Red-crowned Parakeet
- Red-crowned Woodpecker
- Red-eyed Dove
- Red-faced Cisticola
- Red-faced Cormorant
- Red-faced Crombec
- Red-faced Mousebird
- Red-faced Parrot
- Red-faced Spinetail
- Red-faced Warbler
- Red-flanked Bluetail
- Red-flanked Lorikeet
- Red-footed Booby
- Red-footed Falcon
- Red-fronted Barbet
- Red-fronted Parrot
- Red-fronted Prinia
- Red-fronted Rosefinch
- Red-fronted Serin
- Red-fronted Tinkerbird
- Red-headed Barbet
- Red-headed Finch
- Red-headed Lovebird
- Red-headed Malimbe
- Red-headed Manakin
- Red-headed Parrotfinch
- Red-headed Quelea
- Red-headed Trogon
- Red-headed Vulture
- Red-headed Woodpecker
- Red-hooded Tanager
- Red-kneed Dotterel
- Red-knobbed Coot
- Red-knobbed Imperial Pigeon
- Red-legged Honeycreeper
- Red-legged Kittiwake
- Red-legged Partridge
- Red-masked Parakeet
- Red-naped Fruit Dove
- Red-naped Ibis
- Red-naped Sapsucker
- Red-necked Avocet
- Red-necked Buzzard
- Red-necked Falcon
- Red-necked Grebe
- Red-necked Phalarope
- Red-necked Spurfowl
- Red-necked Stint
- Red-necked Tanager
- Red-necked Woodpecker
- Red-pate Cisticola
- Red-ruffed Fruitcrow
- Red-rumped Cacique
- Red-rumped Swallow
- Red-rumped Tinkerbird
- Red-rumped Wheatear
- Red-shouldered Hawk
- Red-shouldered Tanager
- Red-stained Woodpecker
- Red-tailed Bristlebill
- Red-tailed Hawk
- Red-tailed Shrike
- Red-tailed Tropicbird
- Red-tailed Wheatear
- Red-throated Bee-eater
- Red-throated Caracara
- Red-throated Cliff Swallow
- Red-throated Loon
- Red-throated Parrotfinch
- Red-throated Pipit
- Red-throated Tit
- Red-throated Wryneck
- Red-vented Bulbul
- Red-vented Malimbe
- Red-vested Myzomela
- Red-wattled Lapwing
- Red-whiskered Bulbul
- Red-winged Blackbird
- Red-winged Grey Warbler
- Red-winged Lark
- Red-winged Starling
- Red Avadavat
- Red Collared Dove
- Red Crossbill
- Red Fox Sparrow
- Red Junglefowl
- Red Kite
- Red Knot
- Red Phalarope
- Red Shoveler
- Reddish Egret
- Reddish Hermit
- Redthroat
- Redwing
- Reed Cormorant
- Regent Honeyeater
- Regent Parrot
- Regent Whistler
- Reichenbach's Sunbird
- Rennell Fantail
- Rennell Shrikebill
- Rennell Starling
- Rennell Whistler
- Rennell White-eye
- Retz's Helmetshrike
- Richard's Pipit
- Rifleman
- Ring-billed Gull
- Ring-necked Dove
- Ring-necked Duck
- Ring Ouzel
- Ringed Kingfisher
- River Lapwing
- River Prinia
- River Tern
- River Warbler
- Riverbank Warbler
- Rivoli's Hummingbird
- Roadside Hawk
- Robin Accentor
- Rock-loving Cisticola
- Rock Bunting
- Rock Dove
- Rock Earthcreeper
- Rock Firefinch
- Rock Pratincole
- Rock Ptarmigan
- Rock Sandpiper
- Rock Shag
- Rock Sparrow
- Rock Wren
- Rockrunner
- Rook
- Rose-collared Piha
- Rose-crowned Fruit Dove
- Rose-fronted Parakeet
- Rose-ringed Parakeet
- Roseate Spoonbill
- Roseate Tern
- Ross's Gull
- Ross's Turaco
- Rosy-billed Pochard
- Rosy-patched Bushshrike
- Rosy-throated Longclaw
- Rosy Bee-eater
- Rosy Starling
- Rouget's Rail
- Rough-legged Buzzard
- Round-tailed Manakin
- Roviana Rail
- Royal Cinclodes
- Royal Spoonbill
- Royal Tern
- Ruby-crowned Kinglet
- Ruby-topaz Hummingbird
- Ruddy-breasted Crake
- Ruddy-breasted Seedeater
- Ruddy-headed Goose
- Ruddy-tailed Flycatcher
- Ruddy Cuckoo-Dove
- Ruddy Duck
- Ruddy Ground Dove
- Ruddy Kingfisher
- Ruddy Pigeon
- Ruddy Shelduck
- Ruddy Turnstone
- Rufescent Imperial Pigeon
- Rufescent Prinia
- Rufescent Tiger Heron
- Ruff
- Rufous-backed Dwarf Kingfisher
- Rufous-backed Honeyeater
- Rufous-banded Honeyeater
- Rufous-bellied Eagle
- Rufous-bellied Euphonia
- Rufous-bellied Kookaburra
- Rufous-bellied Nighthawk
- Rufous-bellied Niltava
- Rufous-bellied Tit
- Rufous-booted Racket-tail
- Rufous-breasted Accentor
- Rufous-breasted Chat-Tyrant
- Rufous-breasted Hermit
- Rufous-breasted Sabrewing
- Rufous-breasted Sparrowhawk
- Rufous-browed Conebill
- Rufous-browed Peppershrike
- Rufous-capped Antthrush
- Rufous-capped Babbler
- Rufous-capped Nunlet
- Rufous-capped Thornbill
- Rufous-cheeked Nightjar
- Rufous-chested Tanager
- Rufous-chinned Laughingthrush
- Rufous-collared Sparrow
- Rufous-crested Coquette
- Rufous-crowned Eremomela
- Rufous-crowned Laughingthrush
- Rufous-faced Warbler
- Rufous-fronted Antthrush
- Rufous-fronted Prinia
- Rufous-headed Chachalaca
- Rufous-headed Pygmy Tyrant
- Rufous-lored Tyrannulet
- Rufous-naped Greenlet
- Rufous-naped Lark
- Rufous-necked Hornbill
- Rufous-necked Snowfinch
- Rufous-necked Wood Rail
- Rufous-sided Broadbill
- Rufous-sided Crake
- Rufous-sided Honeyeater
- Rufous-sided Scrub Tyrant
- Rufous-tailed Flatbill
- Rufous-tailed Hummingbird
- Rufous-tailed Jacamar
- Rufous-tailed Lark
- Rufous-tailed Palm Thrush
- Rufous-tailed Scrub Robin
- Rufous-tailed Weaver
- Rufous-throated Bronze Cuckoo
- Rufous-throated Dipper
- Rufous-throated Fulvetta
- Rufous-throated Partridge
- Rufous-throated Sapphire
- Rufous-throated Solitaire
- Rufous-throated Tanager
- Rufous-vented Grass Babbler
- Rufous-vented Paradise Flycatcher
- Rufous-winged Antshrike
- Rufous-winged Sparrow
- Rufous Chatterer
- Rufous Fieldwren
- Rufous Gnateater
- Rufous Hummingbird
- Rufous Motmot
- Rufous Piculet
- Rufous Sibia
- Rufous Treepie
- Rufous Vanga
- Rufous Whistler
- Rufous Woodpecker
- Rufous Wren
- Rüppell's Robin-Chat
- Rüppell's Starling
- Rüppell's Vulture
- Rüppell's Warbler
- Ruspoli's Turaco
- Russet-backed Oropendola
- Russet-crowned Warbler
- Russet Antshrike
- Russet Sparrow
- Rustic Bunting
- Rusty-backed Spinetail
- Rusty-breasted Whistler
- Rusty-cheeked Scimitar Babbler
- Rusty-fronted Canastero
- Rusty-fronted Tody-Flycatcher
- Rusty-margined Flycatcher
- Rusty Blackbird
- Rusty Laughingthrush
- Rwenzori Hill Babbler
- Ryukyu Minivet
- Ryukyu Robin
- Ryukyu Scops Owl