- Gadwall
- Garganey
- Gartered Trogon
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Glaucous-winged Gull
- Glaucous Tanager
- Glistening-green Tanager
- Glossy-black Thrush
- Glossy Ibis
- Glowing Puffleg
- Goldcrest
- Golden-bellied Flycatcher
- Golden-breasted Fruiteater
- Golden-collared Toucanet
- Golden-crowned Flycatcher
- Golden-crowned Kinglet
- Golden-crowned Sparrow
- Golden-fronted Whitestart
- Golden-fronted Woodpecker
- Golden-headed Quetzal
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-rumped Euphonia
- Golden-winged Sparrow
- Golden Grosbeak
- Golden Tanager
- Gorgeted Sunangel
- Grass Wren
- Grasshopper Buzzard
- Great-tailed Grackle
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Cormorant
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Grey Shrike
- Great Kiskadee
- Great Potoo
- Great Reed Warbler
- Great Shearwater
- Great Skua
- Great Spotted Woodpecker
- Great Thrush
- Great Tit
- Great Tit (bokharensis)
- Great White Pelican
- Greater Ani
- Greater Blue-eared Starling
- Greater Flamingo
- Greater Honeyguide
- Greater Painted-snipe
- Greater Pewee
- Greater Sand Plover
- Greater Short-toed Lark
- Greater White-fronted Goose
- Greater Yellow-headed Vulture
- Green-backed Camaroptera
- Green-backed Trogon
- Green-tailed Goldenthroat
- Green-tailed Jacamar
- Green Bee-eater
- Green Heron
- Green Honeycreeper
- Green Kingfisher
- Green Oropendola
- Green Sandpiper
- Green Thorntail
- Green Wood Hoopoe
- Greenish Warbler
- Grey-breasted Martin
- Grey-breasted Sabrewing
- Grey-breasted Wood Wren
- Grey-cowled Wood Rail
- Grey-headed Bushshrike
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Woodpecker
- Grey-hooded Bush Tanager
- Grey-lined Hawk
- Grey Catbird
- Grey Heron
- Grey Kestrel
- Grey Kingbird
- Grey Partridge
- Grey Pileated Finch
- Grey Plover
- Grey Seedeater
- Grey Silky-flycatcher
- Greyish Saltator
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Guianan Cock-of-the-rock
- Guianan Red Cotinga
- Guianan Schiffornis
- Guianan Streaked Antwren
- Guinea Turaco
- Güldenstädt's Redstart
- Gull-billed Tern