- Galah
- Galapagos Dove
- Galapagos Flycatcher
- Galapagos Hawk
- Galapagos Mockingbird
- Galapagos Shearwater
- Garden Warbler
- Gartered Trogon
- Giant Coot
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Giant Weaver
- Giant Wood Rail
- Glaucous Gull
- Glistening-green Tanager
- Glossy Ibis
- Goldcrest
- Golden-backed Weaver
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-breasted Starling
- Golden-cheeked Woodpecker
- Golden-collared Honeycreeper
- Golden-crowned Flycatcher
- Golden-headed Cisticola
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Tanager
- Golden-tailed Woodpecker
- Golden-winged Sunbird
- Golden Eagle
- Golden Grosbeak
- Golden Palm Weaver
- Golden Pipit
- Golden Tanager
- Goliath Heron
- Goliath Imperial Pigeon
- Grant's Wood Hoopoe
- Grassland Sparrow
- Great-tailed Grackle
- Great Antshrike
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Bowerbird
- Great Bustard
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Frigatebird
- Great Grey Shrike
- Great Kiskadee
- Great Lizard Cuckoo
- Great Potoo
- Great Rufous Woodcreeper
- Great Skua
- Great Slaty Woodpecker
- Great Sparrow
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Thrush
- Great Tit
- Great White Pelican
- Greater Ani
- Greater Antillean Bullfinch
- Greater Antillean Grackle
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Double-collared Sunbird
- Greater Flamingo
- Greater Hoopoe-Lark
- Greater Kestrel
- Greater Painted-snipe
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Roadrunner
- Greater Short-toed Lark
- Greater Thornbird
- Greater Vasa Parrot
- Greater White-fronted Goose
- Greater Yellowlegs
- Green-and-black Fruiteater
- Green-backed White-eye
- Green-barred Woodpecker
- Green-breasted Mountaingem
- Green-cheeked Parakeet
- Green-crowned Brilliant
- Green-headed Tanager
- Green-tailed Jacamar
- Green-throated Carib
- Green-winged Teal
- Green Heron
- Green Honeycreeper
- Green Imperial Pigeon
- Green Jay
- Green Junglefowl
- Green Kingfisher
- Green Oriole
- Green Pheasant
- Green Pygmy Goose
- Green Sandpiper
- Green Thorntail
- Green Wood Hoopoe
- Grey-and-gold Tanager
- Grey-backed Camaroptera
- Grey-backed Fiscal
- Grey-bellied Flowerpiercer
- Grey-bellied Shrike-Tyrant
- Grey-breasted Martin
- Grey-breasted Prinia
- Grey-breasted Spiderhunter
- Grey-breasted Spurfowl
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cowled Wood Rail
- Grey-crested Finch
- Grey-crowned Yellowthroat
- Grey-eared Honeyeater
- Grey-headed Bushshrike
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Honeyeater
- Grey-headed Kingfisher
- Grey-headed Lovebird
- Grey-headed Robin
- Grey-headed Tanager
- Grey-hooded Sierra Finch
- Grey-hooded Warbler
- Grey Butcherbird
- Grey Catbird
- Grey Crowned Crane
- Grey Fantail
- Grey Francolin
- Grey Gerygone
- Grey Go-away-bird
- Grey Gull
- Grey Hawk
- Grey Heron
- Grey Kestrel
- Grey Kingbird
- Grey Monjita
- Grey Partridge
- Grey Pileated Finch
- Grey Plover
- Grey Shrikethrush
- Grey Teal
- Grey Treepie
- Grey Trembler
- Grey Wagtail
- Grey Warbler-Finch
- Greyish Baywing
- Greyish Eagle-Owl
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Groundscraper Thrush
- Guadeloupe Woodpecker
- Guanay Cormorant
- Guianan Trogon
- Guira Cuckoo
- Gull-billed Tern