- Gadwall
- Garganey
- Giant Cowbird
- Gila Woodpecker
- Glossy Ibis
- Great-tailed Grackle
- Great Black-backed Gull
- Great Blue Heron
- Great Cormorant
- Great Crested Flycatcher
- Great Crested Grebe
- Great Egret
- Great Grey Shrike
- Great Skua
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Tit
- Greater Flamingo
- Greater Yellowlegs
- Green Heron
- Grey Heron
- Grey Plover
- Grey Wagtail
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Guianan Trogon