- Gadwall
- Garganey
- Germain's Swiftlet
- Giant Cowbird
- Glaucous Gull
- Glittering-throated Emerald
- Glossy Ibis
- Goldcrest
- Golden-bellied Gerygone
- Golden-cheeked Warbler
- Golden-headed Manakin
- Golden-winged Warbler
- Graceful Prinia
- Grasshopper Sparrow
- 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 Knot
- Great Myna
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Tit
- Greater Coucal
- Greater Crested Tern
- Greater Flamingo
- Greater Hoopoe-Lark
- Greater Racket-tailed Drongo
- Greater Sand Plover
- Greater Scaup
- Greater Short-toed Lark
- Greater Yellowlegs
- Green-backed Trogon
- Green-rumped Parrotlet
- Green-tailed Jacamar
- Green-winged Teal
- Green Bee-eater
- Green Hermit
- Green Heron
- Green Ibis
- Green Kingfisher
- Green Sandpiper
- Grey-cheeked Thrush
- Grey-cowled Wood Rail
- Grey-headed Chachalaca
- Grey-headed Chickadee
- Grey-lined Hawk
- Grey-tailed Tattler
- Grey Catbird
- Grey Francolin
- Grey Heron
- Grey Hypocolius
- Grey Kingbird
- Grey Plover
- Grey Wagtail
- Greylag Goose
- Griffon Vulture
- Guianan Cock-of-the-rock
- Gull-billed Tern