- Gadwall
- Garden Warbler
- Giant Cowbird
- Giant Kingfisher
- Giant Snipe
- Glittering-throated Emerald
- Glossy-backed Becard
- Glossy Ibis
- Goldcrest
- Golden-breasted Bunting
- Golden-collared Woodpecker
- Golden-crowned Spadebill
- Golden-green Woodpecker
- Golden-headed Manakin
- Golden-olive Woodpecker
- Golden-sided Euphonia
- Golden-spangled Piculet
- Golden-tailed Woodpecker
- Golden-winged Parakeet
- Golden Eagle
- Grassland Sparrow
- Gray's Lark
- Great-billed Hermit
- Great Antshrike
- Great Black-backed Gull
- Great Black Hawk
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Kiskadee
- Great Potoo
- Great Reed Warbler
- Great Sparrow
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Tinamou
- Great Tit
- Great White Pelican
- Greater Ani
- Greater Crested Tern
- Greater Flamingo
- Greater Kestrel
- Greater Yellow-headed Vulture
- Greater Yellowlegs
- Green-and-rufous Kingfisher
- Green-backed Trogon
- Green-rumped Parrotlet
- Green-tailed Goldenthroat
- Green-tailed Jacamar
- Green-throated Mango
- Green-winged Pytilia
- Green Aracari
- Green Honeycreeper
- Green Kingfisher
- Green Oropendola
- Green Wood Hoopoe
- Greenish Elaenia
- Grey-backed Camaroptera
- Grey-backed Sparrow-Lark
- Grey-breasted Crake
- Grey-breasted Martin
- Grey-breasted Sabrewing
- Grey-chested Greenlet
- Grey-cowled Wood Rail
- Grey-crowned Flatbill
- Grey-fronted Dove
- Grey-headed Chickadee
- Grey-headed Gull
- Grey-headed Kite
- Grey-lined Hawk
- Grey-winged Trumpeter
- Grey Antbird
- Grey Antwren
- Grey Go-away-bird
- Grey Heron
- Grey Kingbird
- Grey Plover
- Grey Wagtail
- Greyish Mourner
- Greyish Saltator
- Greylag Goose
- Griffon Vulture
- Groundscraper Thrush
- Guianan Cock-of-the-rock
- Guianan Red Cotinga
- Guianan Streaked Antwren
- Guianan Toucanet
- Guianan Trogon
- Guianan Tyrannulet
- Guianan Warbling Antbird
- Guianan Woodcreeper
- Gull-billed Tern