- Gabar Goshawk
- Gadwall
- Galah
- Galapagos Dove
- Galapagos Flycatcher
- Galapagos Hawk
- Galapagos Mockingbird
- Galapagos Penguin
- Galapagos Shearwater
- Garden Emerald
- Garden Warbler
- Garganey
- Garnet Robin
- Gartered Trogon
- Genovesa Cactus Finch
- Genovesa Ground Finch
- Giant Coua
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Gilded Barbet
- Gilded Sapphire
- Gilt-edged Tanager
- Glacier Finch
- Glistening-green Tanager
- Glittering-bellied Emerald
- Glossy-black Thrush
- Glossy Flowerpiercer
- Glossy Ibis
- Goldcrest
- Goldcrest (teneriffae)
- Golden-bellied Gerygone
- Golden-billed Saltator
- Golden-breasted Puffleg
- Golden-chevroned Tanager
- Golden-collared Honeycreeper
- Golden-collared Macaw
- Golden-collared Manakin
- Golden-collared Toucanet
- Golden-crested Myna
- Golden-eared Tanager
- Golden-eyed Flowerpiercer
- Golden-faced Tyrannulet
- Golden-headed Cisticola
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-plumed Parakeet
- Golden-rumped Euphonia
- Golden-tailed Sapphire
- Golden Tanager
- Goliath Heron
- Gorgeted Sunangel
- Gorgeted Woodstar
- Gould's Jewelfront
- Grass-green Tanager
- Grass Wren
- Grassland Sparrow
- Great-billed Heron
- Great-tailed Grackle
- Great Antshrike
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Frigatebird
- Great Grey Shrike
- Great Hornbill
- Great Horned Owl
- Great Kiskadee
- Great Lizard Cuckoo
- Great Potoo
- Great Reed Warbler
- Great Sapphirewing
- Great Spotted Woodpecker
- Great Spotted Woodpecker (canariensis)
- Great Stone-curlew
- Great Thrush
- Great Tit
- Great Woodswallow
- Greater Ani
- Greater Antillean Grackle
- Greater Coucal
- Greater Crested Tern
- Greater Flameback
- Greater Honeyguide
- Greater Kestrel
- Greater Painted-snipe
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Thornbird
- Greater Vasa Parrot
- Greater Yellow-headed Vulture
- Greater Yellowlegs
- Greater Yellownape
- Green-and-rufous Kingfisher
- Green-backed Becard
- Green-backed Camaroptera
- Green-backed Hillstar
- Green-backed Tit
- Green-backed Trogon
- Green-barred Woodpecker
- Green-billed Malkoha
- Green-crowned Brilliant
- Green-crowned Plovercrest
- Green-eared Barbet
- Green-headed Oriole
- Green-headed Sunbird
- Green-headed Tanager
- Green-rumped Parrotlet
- Green-tailed Jacamar
- Green-throated Carib
- Green-winged Pytilia
- Green Barbet
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Imperial Pigeon
- Green Jay
- Green Jery
- Green Kingfisher
- Green Peafowl
- Green Rosella
- Green Sandpiper
- Green Thorntail
- Green Warbler-Finch
- Green White-eye
- Green Wood Hoopoe
- Greenish Schiffornis
- Grey-backed Camaroptera
- Grey-backed Fiscal
- Grey-breasted Martin
- Grey-breasted Mountain Toucan
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-capped Pygmy Woodpecker
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cheeked Fulvetta
- Grey-chinned Minivet
- Grey-cowled Wood Rail
- Grey-crested Cacholote
- Grey-crowned Flatbill
- Grey-eared Brushfinch
- Grey-fronted Quail-Dove
- Grey-headed Canary-flycatcher
- Grey-headed Chachalaca
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Kite
- Grey-headed Lovebird
- Grey-headed Nigrita
- Grey-headed Parakeet
- Grey-headed Swamphen
- Grey-headed Woodpecker
- Grey-hooded Attila
- Grey-hooded Bush Tanager
- Grey-lined Hawk
- Grey-throated Barbet
- Grey Bush Chat
- Grey Butcherbird
- Grey Catbird
- Grey Crowned Crane
- Grey Fantail
- Grey Goshawk
- Grey Heron
- Grey Monjita
- Grey Parrot
- Grey Plover
- Grey Shrikethrush
- Grey Teal
- Grey Tinamou
- Grey Wagtail
- Grey Wren-Warbler
- Greyish Baywing
- Greyish Mourner
- Greylag Goose
- Groove-billed Ani
- Guayaquil Woodpecker
- Guianan Puffbird
- Guianan Trogon
- Guira Cuckoo
- Guira Tanager
- Gull-billed Tern