- Gabar Goshawk
- Gabela Akalat
- Gabela Helmetshrike
- Gabon Woodpecker
- Gadwall
- Galah
- Gambel's Quail
- Gang-gang Cockatoo
- Gansu Leaf Warbler
- Garden Warbler
- Garganey
- Garnet Robin
- Gentoo Penguin
- Geoffroy's Wedgebill
- Germain's Peacock-Pheasant
- Giant Conebill
- Giant Honeyeater
- Giant Hummingbird
- Giant Kingfisher
- Giant Sunbird
- Giant Weaver
- Gila Woodpecker
- Gilbert's Whistler
- Gilded Barbet
- Gilded Flicker
- Gillett's Lark
- Gilt-edged Tanager
- Gizo White-eye
- Glaucous-winged Gull
- Glaucous Gull
- Glittering-bellied Emerald
- Glittering-throated Emerald
- Glittering Kingfisher
- Glossy Flowerpiercer
- Glossy Ibis
- Glossy Swiftlet
- Glowing Puffleg
- Goldcrest
- Golden-backed Bishop
- Golden-bellied Flycatcher
- Golden-breasted Bunting
- Golden-breasted Puffleg
- Golden-breasted Starling
- Golden-capped Parakeet
- Golden-cheeked Warbler
- Golden-collared Honeycreeper
- Golden-collared Tanager
- Golden-collared Toucanet
- Golden-collared Woodpecker
- Golden-crested Myna
- Golden-crowned Kinglet
- Golden-crowned Spadebill
- Golden-crowned Sparrow
- Golden-crowned Tanager
- Golden-crowned Warbler
- Golden-faced Tyrannulet
- Golden-fronted Leafbird
- Golden-fronted Whitestart
- Golden-green Woodpecker
- Golden-headed Cisticola
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-plumed Parakeet
- Golden-spangled Piculet
- Golden-tailed Sapphire
- Golden-tailed Woodpecker
- Golden-throated Barbet
- Golden-winged Manakin
- Golden-winged Sunbird
- Golden-winged Tody-Flycatcher
- Golden Cuckooshrike
- Golden Eagle
- Golden Fruit Dove
- Golden Greenbul
- Golden Grosbeak
- Golden Monarch
- Golden Nightjar
- Golden Parrotbill
- Golden Pipit
- Golden Tanager
- Goldenface
- Goldie's Bird-of-paradise
- Goliath Heron
- Goliath Imperial Pigeon
- Gorgeous Bushshrike
- Gorgeted Sunangel
- Gould's Frogmouth
- Gould's Jewelfront
- Gould's Toucanet
- Grace's Warbler
- Graceful Prinia
- Gran Canaria Blue Chaffinch
- Grass Wren
- Grasshopper Buzzard
- Great-billed Mannikin
- Great-billed Parrot
- Great-tailed Grackle
- Great Antshrike
- Great Barbet
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Bustard
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Frigatebird
- Great Grebe
- Great Grey Owl
- Great Grey Shrike
- Great Hornbill
- Great Horned Owl
- Great Indian Bustard
- Great Iora
- Great Jacamar
- Great Kiskadee
- Great Knot
- Great Lizard Cuckoo
- Great Myna
- Great Potoo
- Great Reed Warbler
- Great Sapphirewing
- Great Skua
- Great Snipe
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Thrush
- Great Tit
- Great White Pelican
- Great Woodswallow
- Great Xenops
- Greater Ani
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Flameback
- Greater Flamingo
- Greater Green Leafbird
- Greater Hoopoe-Lark
- Greater Kestrel
- Greater Necklaced Laughingthrush
- Greater Painted-snipe
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Roadrunner
- Greater Sand Plover
- Greater Scaup
- Greater Short-toed Lark
- Greater Sooty Owl
- Greater Spotted Eagle
- Greater Striped Swallow
- Greater White-fronted Goose
- Greater Yellow-headed Vulture
- Greater Yellowlegs
- Green-and-black Fruiteater
- Green-and-white Hummingbird
- Green-backed Becard
- Green-backed Camaroptera
- Green-backed Tit
- Green-backed Trogon
- Green-backed White-eye
- Green-billed Malkoha
- Green-breasted Bushshrike
- Green-breasted Mango
- Green-capped Eremomela
- Green-crowned Brilliant
- Green-eared Barbet
- Green-headed Sunbird
- Green-headed Tanager
- Green-legged Partridge
- Green-rumped Parrotlet
- Green-tailed Towhee
- Green-throated Mango
- Green-throated Sunbird
- Green-winged Pytilia
- Green-winged Teal
- Green Aracari
- Green Avadavat
- Green Bee-eater
- Green Crombec
- Green Figbird
- Green Honeycreeper
- Green Hylia
- Green Ibis
- Green Imperial Pigeon
- Green Junglefowl
- Green Kingfisher
- Green Longtail
- Green Malkoha
- Green Oropendola
- Green Peafowl
- Green Pheasant
- Green Sandpiper
- Green Thorntail
- Green Tinkerbird
- Greenish Elaenia
- Greenish Puffleg
- Grey-and-buff Woodpecker
- Grey-and-gold Warbler
- Grey-backed Cisticola
- Grey-backed Fiscal
- Grey-backed Hawk
- Grey-backed Shrike
- Grey-backed Sparrow-Lark
- Grey-backed Storm Petrel
- Grey-backed Tachuri
- Grey-bellied Tesia
- Grey-breasted Babbler
- Grey-breasted Crake
- Grey-breasted Flycatcher
- Grey-breasted Martin
- Grey-breasted Mountain Toucan
- Grey-breasted Parakeet
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-breasted Wood Wren
- Grey-browed Brushfinch
- Grey-capped Cicadabird
- Grey-capped Greenfinch
- Grey-capped Pygmy Woodpecker
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cheeked Fulvetta
- Grey-cheeked Parakeet
- Grey-cheeked Thrush
- Grey-chinned Minivet
- Grey-chinned Sunbird
- Grey-crowned Crocias
- Grey-crowned Flatbill
- Grey-crowned Rosy Finch
- Grey-eared Brushfinch
- Grey-eared Honeyeater
- Grey-fronted Dove
- Grey-headed Batis
- Grey-headed Broadbill
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Chickadee
- Grey-headed Fish Eagle
- Grey-headed Goshawk
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Lapwing
- Grey-headed Mannikin
- Grey-headed Nigrita
- Grey-headed Silverbill
- Grey-headed Spinetail
- Grey-headed Swamphen
- Grey-headed Tanager
- Grey-headed Woodpecker
- Grey-hooded Attila
- Grey-hooded Bush Tanager
- Grey-hooded Warbler
- Grey-lined Hawk
- Grey-necked Wood Rail
- Grey-rumped Swallow
- Grey-streaked Honeyeater
- Grey-tailed Tattler
- Grey-throated Barbet
- Grey-throated Martin
- Grey-winged Robin-Chat
- Grey Apalis
- Grey Bush Chat
- Grey Butcherbird
- Grey Crested Tit
- Grey Crow
- Grey Crowned Crane
- Grey Cuckooshrike
- Grey Fantail
- Grey Francolin
- Grey Gerygone
- Grey Go-away-bird
- Grey Hawk
- Grey Heron
- Grey Hypocolius
- Grey Kestrel
- Grey Longbill
- Grey Parrot
- Grey Partridge
- Grey Petrel
- Grey Plover
- Grey Shrikethrush
- Grey Sunbird
- Grey Teal
- Grey Tinamou
- Grey Treepie
- Grey Wagtail
- Grey Wren-Warbler
- Greyish Eagle-Owl
- Greyish Mourner
- Greylag Goose
- Griffon Vulture
- Groove-billed Toucanet
- Ground Tit
- Groundscraper Thrush
- Guayaquil Woodpecker
- Guianan Cock-of-the-rock
- Guianan Trogon
- Guianan Tyrannulet
- Guinea Turaco
- Guira Cuckoo
- Güldenstädt's Redstart
- Gull-billed Tern
- Gurney's Eagle
- Gyrfalcon