- Galapagos Flycatcher
- Gambaga Flycatcher
- Geelvink Fruit Dove
- Giant Conebill
- Giant Coua
- Giant Wood Rail
- Giant Wren
- Gilded Sapphire
- Gillett's Lark
- Glaucous-winged Gull
- Glaucous Gull
- Glittering-throated Emerald
- Glossy-black Thrush
- Glossy Antshrike
- Glossy Flowerpiercer
- Glossy Swiftlet
- Goeldi's Antbird
- Gold-ringed Tanager
- Golden-backed Mountain Tanager
- Golden-backed Weaver
- Golden-bellied Starfrontlet
- Golden-breasted Fruiteater
- Golden-breasted Fulvetta
- Golden-collared Macaw
- Golden-collared Manakin
- Golden-collared Tanager
- Golden-collared Toucanet
- Golden-crowned Spadebill
- Golden-eared Tanager
- Golden-fronted Greenlet
- Golden-fronted Whitestart
- Golden-green Woodpecker
- Golden-naped Finch
- Golden-rumped Euphonia
- Golden-spangled Piculet
- Golden-tailed Parrotlet
- Golden-tailed Sapphire
- Golden-winged Cacique
- Golden-winged Manakin
- Golden-winged Sparrow
- Golden Babbler
- Golden Monarch
- Golden Pipit
- Golden Tanager
- Goldie's Lorikeet
- Goliath Coucal
- Gorgeted Sunangel
- Gould's Toucanet
- Gran Canaria Blue Chaffinch
- Grant's Bluebill
- Grass-green Tanager
- Grass Wren
- Grassland Sparrow
- Grauer's Broadbill
- Grauer's Swamp Warbler
- Great-billed Heron
- Great-billed Mannikin
- Great-billed Parrot
- Great-billed Seed Finch
- Great Antshrike
- Great Crested Flycatcher
- Great Cuckoo-Dove
- Great Horned Owl
- Great Indian Bustard
- Great Myna
- Great Parrotbill
- Great Shrike-Tyrant
- Great Spinetail
- Great Xenops
- Greater Adjutant
- Greater Blue-eared Starling
- Greater Coucal
- Greater Kestrel
- Greater Painted-snipe
- Greater Thornbird
- Greater Wagtail-Tyrant
- Greater Yellow-headed Vulture
- Green-and-black Fruiteater
- Green-and-rufous Kingfisher
- Green-backed Firecrown
- Green-backed Hillstar
- Green-backed Sparrow
- Green-backed Tit
- Green-bellied Hummingbird
- Green-breasted Pitta
- Green-capped Tanager
- Green-cheeked Parakeet
- Green-crowned Warbler
- Green-fronted Lancebill
- Green-fronted White-eye
- Green-headed Oriole
- Green-headed Sunbird
- Green-headed Tanager
- Green-tailed Goldenthroat
- Green-tailed Sunbird
- Green-throated Mountaingem
- Green-winged Pytilia
- Green Avadavat
- Green Barbet
- Green Crombec
- Green Jay
- Green Malkoha
- Green Manakin
- Green Oropendola
- Green Twinspot
- Greenish Elaenia
- Greenish Schiffornis
- Greenish Yellow Finch
- Grey-and-gold Warbler
- Grey-backed Camaroptera
- Grey-backed Hawk
- Grey-backed Shrike
- Grey-backed Storm Petrel
- Grey-backed Tachuri
- Grey-barred Wren
- Grey-bellied Antbird
- Grey-bellied Bulbul
- Grey-bellied Cuckoo
- Grey-breasted Flycatcher
- Grey-breasted Mountain Toucan
- Grey-breasted Parakeet
- Grey-breasted Prinia
- Grey-breasted Seedsnipe
- Grey-breasted Spurfowl
- Grey-breasted Wood Wren
- Grey-browed Brushfinch
- Grey-capped Flycatcher
- Grey-capped Social Weaver
- Grey-capped Tyrannulet
- Grey-chested Jungle Flycatcher
- Grey-collared Becard
- Grey-crested Cacholote
- Grey-crested Tit
- Grey-crowned Rosy Finch
- Grey-eyed Greenlet
- Grey-green Scrubwren
- Grey-headed Bristlebill
- Grey-headed Bullfinch
- Grey-headed Bushshrike
- Grey-headed Chickadee
- Grey-headed Cuckooshrike
- Grey-headed Dove
- Grey-headed Fish Eagle
- Grey-headed Fruit Dove
- Grey-headed Goshawk
- Grey-headed Kingfisher
- Grey-headed Kite
- Grey-headed Oliveback
- Grey-headed Parrotbill
- Grey-headed Silverbill
- Grey-headed Tanager
- Grey-hooded Attila
- Grey-hooded Flycatcher
- Grey-hooded Warbler
- Grey-sided Bush Warbler
- Grey-sided Laughingthrush
- Grey-streaked Honeyeater
- Grey-tailed Piha
- Grey-throated Babbler
- Grey-throated Barbet
- Grey-throated Chat
- Grey-throated Tit-Flycatcher
- Grey-throated Warbler
- Grey-throated Warbling Finch
- Grey-winged Cotinga
- Grey-winged Inca Finch
- Grey-winged Robin-Chat
- Grey-winged Trumpeter
- Grey Apalis
- Grey Crow
- Grey Hypocolius
- Grey Pileated Finch
- Grey Shrikethrush
- Grey Waxbill
- Grey Whistler
- Grey Wren-Warbler
- Greyish Baywing
- Grimwood's Longclaw
- Guatemalan Tyrannulet
- Guayaquil Woodpecker
- Guianan Schiffornis
- Guianan Trogon
- Guianan Tyrannulet
- Guianan Warbling Antbird
- Gurney's Eagle
- Gurney's Sugarbird