- Gadwall
- Garden Warbler
- Garganey
- Giant Hummingbird
- Giant Kingfisher
- Giant Wood Rail
- Gilded Sapphire
- Glaucous Gull
- Glittering-bellied Emerald
- Glossy Ibis
- Goldcrest
- Goldcrest (teneriffae)
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-collared Macaw
- Golden-crowned Kinglet
- Golden-crowned Warbler
- Golden-spotted Ground Dove
- Golden Eagle
- Goliath Heron
- Graceful Prinia
- Grassland Yellow Finch
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Bustard
- Great Cormorant
- Great Crested Flycatcher
- Great Crested Grebe
- Great Dusky Swift
- Great Egret
- Great Grebe
- Great Grey Shrike
- Great Kiskadee
- Great Reed Warbler
- Great Rufous Woodcreeper
- Great Shearwater
- Great Skua
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Tit
- Great White Pelican
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Double-collared Sunbird
- Greater Flamingo
- Greater Painted-snipe
- Greater Rhea
- Greater Scaup
- Greater Short-toed Lark
- Greater Spotted Eagle
- Greater Thornbird
- Greater Wagtail-Tyrant
- Greater White-fronted Goose
- Greater Yellowlegs
- Green-backed Camaroptera
- Green-barred Woodpecker (melanolaimus)
- Green-cheeked Parakeet
- Green-headed Tanager
- Green-winged Pytilia
- Green-winged Saltator
- Green-winged Teal
- Green Bee-eater
- Green Heron
- Green Sandpiper
- Green Wood Hoopoe
- Greenish Yellow Finch
- Grey-breasted Martin
- Grey-headed Bushshrike
- Grey-headed Chickadee
- Grey-headed Gull
- Grey-headed Swamphen
- Grey-headed Woodpecker
- Grey-hooded Parakeet
- Grey-hooded Sierra Finch
- Grey-rumped Swallow
- Grey Catbird
- Grey Crowned Crane
- Grey Francolin
- Grey Go-away-bird
- Grey Heron
- Grey Jay
- Grey Partridge
- Grey Plover
- Grey Sunbird
- Grey Wagtail
- Greyish Baywing
- Greyish Saltator
- Greylag Goose
- Griffon Vulture
- Guira Cuckoo
- Guira Tanager
- Gull-billed Tern
- Gyrfalcon