- Gadwall
- Glaucous Tanager
- Golden-headed Quetzal
- Great-tailed Grackle
- Great Black-backed Gull
- Great Blue Heron
- Great Cormorant
- Great Crested Grebe
- Great Egret
- Great Grebe
- Great Kiskadee
- Great Myna
- Great Spotted Woodpecker
- Great Thrush
- Great Tit
- Great White Pelican
- Greater Blue-eared Starling
- Greater Coucal
- Greater Flamingo
- Greater Rhea
- Greater Yellowlegs
- Green-throated Carib
- Green Heron
- Grey-capped Flycatcher
- Grey-eared Honeyeater
- Grey-headed Chachalaca
- Grey Catbird
- Grey Fantail
- Grey Heron
- Grey Kingbird
- Grey Partridge
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Guianan Trogon