- Gabar Goshawk
- Gabela Akalat
- Gabela Helmetshrike
- Gadwall
- Galah
- Galapagos Dove
- Galapagos Flycatcher
- Galapagos Hawk
- Galapagos Mockingbird
- Galapagos Penguin
- Galapagos Petrel
- Galapagos Shearwater
- Gambel's Quail
- Garden Sunbird
- Garganey
- Garnet-throated Hummingbird
- Gartered Trogon
- Geelvink Fruit Dove
- Geelvink Imperial Pigeon
- Geelvink Pygmy Parrot
- Genovesa Ground Finch
- Gentoo Penguin
- Giant Antshrike
- Giant Conebill
- Giant Coot
- Giant Coua
- Giant Cowbird
- Giant Grey Shrike
- Giant Hummingbird
- Giant Kingfisher
- Giant Laughingthrush
- Giant Scops Owl
- Giant Sunbird
- Giant Weaver
- Giant Wood Rail
- Giant Wren
- Gilbert's Whistler
- Gilded Barbet
- Gilded Sapphire
- Gizo White-eye
- Glacier Finch
- Glaucous Gull
- Glaucous Tanager
- Glistening-green Tanager
- Glittering-bellied Emerald
- Glittering-throated Emerald
- Glossy-black Thrush
- Glossy-mantled Manucode
- Glossy Flowerpiercer
- Glossy Ibis
- Glossy Swiftlet
- Godlewski's Bunting
- Goldcrest
- Golden-backed Bishop
- Golden-backed Weaver
- Golden-bellied Flycatcher
- Golden-bellied Gerygone
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-breasted Fruiteater
- Golden-breasted Fulvetta
- Golden-breasted Puffleg
- Golden-breasted Starling
- Golden-browed Chlorophonia
- Golden-browed Warbler
- Golden-cheeked Woodpecker
- Golden-chested Tanager
- Golden-chevroned Tanager
- Golden-collared Honeycreeper
- Golden-collared Toucanet
- Golden-crowned Flycatcher
- Golden-crowned Kinglet
- Golden-crowned Tanager
- Golden-crowned Warbler
- Golden-eared Tanager
- Golden-eyed Flowerpiercer
- Golden-faced Tyrannulet
- Golden-fronted Fulvetta
- Golden-fronted Leafbird
- Golden-fronted Whitestart
- Golden-green Woodpecker
- Golden-headed Cisticola
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Barbet
- Golden-naped Finch
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-rumped Euphonia
- Golden-rumped Flowerpecker
- Golden-shouldered Parrot
- Golden-spangled Piculet
- Golden-tailed Sapphire
- Golden-tailed Woodpecker
- Golden-throated Barbet
- Golden-whiskered Barbet
- Golden-winged Cacique
- Golden-winged Manakin
- Golden-winged Sparrow
- Golden-winged Sunbird
- Golden Babbler
- Golden Bush Robin
- Golden Cuckooshrike
- Golden Eagle
- Golden Grosbeak
- Golden Monarch
- Golden Myna
- Golden Palm Weaver
- Golden Parrotbill
- Golden Pheasant
- Golden Pipit
- Golden Tanager
- Goliath Coucal
- Goliath Heron
- Gorgeous Bushshrike
- Gorgeted Woodstar
- Gosling's Bunting
- Gould's Jewelfront
- Graceful Honeyeater
- Gran Canaria Blue Chaffinch
- Grande Comore Brush Warbler
- Grande Comore Bulbul
- Grande Comore Drongo
- Grant's Wood Hoopoe
- Grass-green Tanager
- Grass Wren
- Grasshopper Buzzard
- Grasshopper Sparrow
- Grassland Sparrow
- Great-billed Heron
- Great-billed Kingfisher
- Great-billed Mannikin
- Great-billed Parrot
- Great-tailed Grackle
- Great Antshrike
- Great Argus
- Great Barbet
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Bowerbird
- Great Cormorant
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Frigatebird
- Great Grebe
- Great Grey Owl
- Great Grey Shrike
- Great Hanging Parrot
- Great Hornbill
- Great Horned Owl
- Great Inca Finch
- Great Iora
- Great Jacamar
- Great Kiskadee
- Great Knot
- Great Myna
- Great Parrotbill
- Great Potoo
- Great Reed Warbler
- Great Rufous Woodcreeper
- Great Sapphirewing
- Great Slaty Woodpecker
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Thrush
- Great Tinamou
- Great Tit
- Great White Pelican
- Greater Adjutant
- Greater Ani
- Greater Antillean Bullfinch
- Greater Antillean Elaenia
- Greater Antillean Grackle
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Double-collared Sunbird
- Greater Flameback
- Greater Flamingo
- Greater Green Leafbird
- Greater Ground Robin
- Greater Honeyguide
- Greater Hoopoe-Lark
- Greater Kestrel
- Greater Necklaced Laughingthrush
- Greater Painted-snipe
- Greater Pewee
- Greater Prairie Chicken
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Sand Plover
- Greater Short-toed Lark
- Greater Spotted Eagle
- Greater Striped Swallow
- Greater Swamp Warbler
- Greater Thornbird
- Greater Vasa Parrot
- Greater Wagtail-Tyrant
- Greater White-fronted Goose
- Greater Yellow-headed Vulture
- Greater Yellowlegs
- Greater Yellownape
- Green-and-black Fruiteater
- Green-and-gold Tanager
- Green-and-rufous Kingfisher
- Green-and-white Hummingbird
- Green-backed Camaroptera
- Green-backed Hillstar
- Green-backed Honeybird
- Green-backed Honeyeater
- Green-backed Kingfisher
- Green-backed Tit
- Green-backed Trogon
- Green-barred Woodpecker
- Green-billed Coucal
- Green-billed Malkoha
- Green-breasted Mango
- Green-capped Eremomela
- Green-crowned Brilliant
- Green-crowned Plovercrest
- Green-crowned Warbler
- Green-eared Barbet
- Green-fronted Hummingbird
- Green-fronted Lancebill
- Green-headed Oriole
- Green-headed Sunbird
- Green-headed Tanager
- Green-legged Partridge
- Green-rumped Parrotlet
- Green-tailed Jacamar
- Green-tailed Sunbird
- Green-tailed Trainbearer
- Green-throated Sunbird
- Green-winged Pytilia
- Green-winged Saltator
- Green-winged Teal
- Green Barbet
- Green Broadbill
- Green Cochoa
- Green Crombec
- Green Figbird
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Hylia
- Green Ibis
- Green Imperial Pigeon
- Green Iora
- Green Jay
- Green Jery
- Green Junglefowl
- Green Kingfisher
- Green Malkoha
- Green Manakin
- Green Oriole
- Green Oropendola
- Green Peafowl
- Green Pygmy Goose
- Green Racket-tail
- Green Rosella
- Green Sandpiper
- Green Thorntail
- Green Twinspot
- Green Warbler
- Green Wood Hoopoe
- Greenish Elaenia
- Greenish Puffleg
- Greenish Schiffornis
- Greenish Warbler
- Greenish Yellow Finch
- Grey-and-buff Woodpecker
- Grey-and-gold Tanager
- Grey-and-white Tyrannulet
- Grey-backed Camaroptera
- Grey-backed Cisticola
- Grey-backed Fiscal
- Grey-backed Shrike
- Grey-backed Sparrow-Lark
- Grey-backed Tailorbird
- Grey-banded Mannikin
- Grey-barred Wren
- Grey-bellied Bulbul
- Grey-bellied Cuckoo
- Grey-breasted Martin
- Grey-breasted Mountain Toucan
- Grey-breasted Partridge
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-breasted Spiderhunter
- Grey-breasted Wood Wren
- Grey-breasted Woodpecker
- Grey-browed Brushfinch
- Grey-capped Flycatcher
- Grey-capped Pygmy Woodpecker
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cheeked Bulbul
- Grey-cheeked Green Pigeon
- Grey-cheeked Nunlet
- Grey-cheeked Tit-Babbler
- Grey-cheeked Warbler
- Grey-chested Dove
- Grey-chested Jungle Flycatcher
- Grey-chinned Minivet
- Grey-chinned Sunbird
- Grey-collared Becard
- Grey-cowled Wood Rail
- Grey-crested Cacholote
- Grey-crested Finch
- Grey-crested Helmetshrike
- Grey-crested Tit
- Grey-crowned Babbler
- Grey-crowned Rosy Finch
- Grey-crowned Woodpecker
- Grey-faced Buzzard
- Grey-faced Petrel
- Grey-flanked Cinclodes
- Grey-fronted Green Pigeon
- Grey-fronted Honeyeater
- Grey-headed Albatross
- Grey-headed Batis
- Grey-headed Bristlebill
- Grey-headed Bulbul
- Grey-headed Bullfinch
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Chachalaca
- Grey-headed Chickadee
- Grey-headed Dove
- Grey-headed Fish Eagle
- Grey-headed Fruit Dove
- Grey-headed Goshawk
- Grey-headed Gull
- Grey-headed Honeyeater
- Grey-headed Kingfisher
- Grey-headed Kite
- Grey-headed Lapwing
- Grey-headed Lovebird
- Grey-headed Nigrita
- Grey-headed Parrotbill
- Grey-headed Robin
- Grey-headed Silverbill
- Grey-headed Swamphen
- Grey-headed Tanager
- Grey-headed Woodpecker
- Grey-hooded Babbler
- Grey-hooded Bush Tanager
- Grey-hooded Flycatcher
- Grey-hooded Fulvetta
- Grey-hooded Parrotbill
- Grey-hooded Warbler
- Grey-lined Hawk
- Grey-lored Broadbill
- Grey-necked Rockfowl
- Grey-olive Greenbul
- Grey-rumped Swiftlet
- Grey-rumped Treeswift
- Grey-sided Bush Warbler
- Grey-sided Flowerpecker
- Grey-sided Laughingthrush
- Grey-streaked Flycatcher
- Grey-streaked Honeyeater
- Grey-striped Spurfowl
- Grey-tailed Mountaingem
- Grey-tailed Tattler
- Grey-throated Babbler
- Grey-throated Barbet
- Grey-throated Leaftosser
- Grey-throated Tit-Flycatcher
- Grey-winged Blackbird
- Grey-winged Francolin
- Grey-winged Inca Finch
- Grey-winged Robin-Chat
- Grey-winged Trumpeter
- Grey Antbird
- Grey Antwren
- Grey Apalis
- Grey Bush Chat
- Grey Butcherbird
- Grey Catbird
- Grey Crow
- Grey Crowned Crane
- Grey Cuckooshrike
- Grey Emutail
- Grey Fantail
- Grey Francolin
- Grey Gerygone
- Grey Go-away-bird
- Grey Goshawk
- Grey Gull
- Grey Hawk
- Grey Heron
- Grey Junglefowl
- Grey Kestrel
- Grey Kingbird
- Grey Longbill
- Grey Monjita
- Grey Parrot
- Grey Penduline Tit
- Grey Pileated Finch
- Grey Plover
- Grey Seedeater
- Grey Shrikethrush
- Grey Sibia
- Grey Silky-flycatcher
- Grey Sunbird
- Grey Teal
- Grey Tit
- Grey Tit-Flycatcher
- Grey Treepie
- Grey Wagtail
- Grey Warbler-Finch
- Grey Waxbill
- Grey Whistler
- Grey Wren-Warbler
- Greyish Baywing
- Greyish Eagle-Owl
- Greyish Miner
- Greyish Mourner
- Greyish Piculet
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Groove-billed Toucanet
- Grosbeak Starling
- Ground Tit
- Ground Woodpecker
- Groundscraper Thrush
- Guadalcanal Owl
- Guaiabero
- Guanay Cormorant
- Guayaquil Woodpecker
- Guinea Turaco
- Guira Cuckoo
- Guira Tanager
- Güldenstädt's Redstart
- Gull-billed Tern
- Gurney's Sugarbird