- Gabar Goshawk
- Gadwall
- Galah
- Galapagos Dove
- Galapagos Penguin
- Garganey
- Gentoo Penguin
- Giant Coot
- Giant Coua
- Giant Kingfisher
- Gilded Sapphire
- Glaucous-winged Gull
- Glaucous Gull
- Glittering-throated Emerald
- Glossy Ibis
- Golden-backed Weaver
- Golden-breasted Bunting
- Golden-breasted Starling
- Golden-capped Parakeet
- Golden-collared Macaw
- Golden-crowned Sparrow
- Golden-fronted Leafbird
- Golden-rumped Euphonia
- Golden-spotted Ground Dove
- Golden-tailed Woodpecker
- Golden Eagle
- Golden Nightjar
- Golden Palm Weaver
- Golden Pipit
- Goliath Heron
- Gosling's Bunting
- Grass Wren
- Grasshopper Buzzard
- Grassland Sparrow
- Great-tailed Grackle
- Great Antshrike
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Bowerbird
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Frigatebird
- Great Grebe
- Great Grey Shrike
- Great Horned Owl
- Great Kiskadee
- Great Potoo
- Great Reed Warbler
- Great Rufous Woodcreeper
- Great Shearwater
- Great Skua
- Great Sparrow
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Tinamou
- Great Tit
- Great White Pelican
- 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 Scaup
- Greater Short-toed Lark
- Greater Spotted Eagle
- Greater Striped Swallow
- Greater Thornbird
- Greater Vasa Parrot
- Greater White-fronted Goose
- Green-backed Camaroptera
- Green-backed Tit
- Green-billed Coucal
- Green-headed Sunbird
- Green-winged Pytilia
- Green-winged Teal
- Green Heron
- Green Ibis
- Green Imperial Pigeon
- Green Kingfisher
- Green Sandpiper
- Green White-eye
- Green Wood Hoopoe
- Greenish Yellow Finch
- Grey-backed Camaroptera
- Grey-backed Fiscal
- Grey-backed Sparrow-Lark
- Grey-breasted Prinia
- Grey-breasted Seedsnipe
- Grey-capped Social Weaver
- Grey-cowled Wood Rail
- Grey-crested Cacholote
- Grey-crested Finch
- Grey-flanked Cinclodes
- Grey-headed Albatross
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Lovebird
- Grey-headed Nigrita
- Grey-headed Silverbill
- Grey-headed Swamphen
- Grey-hooded Sierra Finch
- Grey-lined Hawk
- Grey-tailed Mountaingem
- Grey-throated Barbet
- Grey-winged Robin-Chat
- Grey Catbird
- Grey Crowned Crane
- Grey Francolin
- Grey Go-away-bird
- Grey Gull
- Grey Heron
- Grey Junglefowl
- Grey Kestrel
- Grey Monjita
- Grey Parrot
- Grey Plover
- Grey Shrikethrush
- Grey Wagtail
- Grey Wren-Warbler
- Greyish Baywing
- Greyish Eagle-Owl
- Greylag Goose
- Griffon Vulture
- Ground Tit
- Groundscraper Thrush
- Guira Cuckoo
- Güldenstädt's Redstart
- Gull-billed Tern