- Gabar Goshawk
- Gambaga Flycatcher
- Gambel's Quail
- Garganey
- Giant Coua
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Gilded Barbet
- Glistening-green Tanager
- Glittering-throated Emerald
- Glossy-black Thrush
- Glossy Flowerpiercer
- Glossy Ibis
- Goldcrest
- Golden-backed Weaver
- Golden-breasted Bunting
- Golden-breasted Puffleg
- Golden-breasted Starling
- Golden-browed Chlorophonia
- Golden-chevroned Tanager
- Golden-collared Honeycreeper
- Golden-collared Toucanet
- Golden-crowned Tanager
- Golden-crowned Warbler
- Golden-faced Tyrannulet
- Golden-fronted Whitestart
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-tailed Sapphire
- Golden-tailed Woodpecker
- Golden-winged Cacique
- Golden-winged Manakin
- Golden-winged Sparrow
- Golden Grosbeak
- Golden Palm Weaver
- Golden Pipit
- Golden Tanager
- Goliath Heron
- Gorgeted Sunangel
- Gorgeted Woodstar
- Gould's Jewelfront
- Grass-green Tanager
- Grasshopper Buzzard
- Grassland Sparrow
- Great-tailed Grackle
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Cormorant
- Great Crested Flycatcher
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Grey Shrike
- Great Hornbill
- Great Horned Owl
- Great Iora
- Great Kiskadee
- Great Knot
- Great Myna
- Great Potoo
- Great Sapphirewing
- Great Sparrow
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Thrush
- Great Tit
- Great White Pelican
- Greater Ani
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Double-collared Sunbird
- Greater Flamingo
- Greater Honeyguide
- Greater Kestrel
- Greater Necklaced Laughingthrush
- Greater Painted-snipe
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Sand Plover
- Greater Short-toed Lark
- Greater Striped Swallow
- Greater Yellow-headed Vulture
- Green-and-black Fruiteater
- Green-and-rufous Kingfisher
- Green-backed Hillstar
- Green-barred Woodpecker
- Green-billed Malkoha
- Green-crowned Brilliant
- Green-eared Barbet
- Green-headed Sunbird
- Green-headed Tanager
- Green-legged Partridge
- Green-tailed Towhee
- Green-winged Pytilia
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Imperial Pigeon
- Green Kingfisher
- Green Peafowl
- Green Sandpiper
- Green Thorntail
- Green Warbler
- Green Wood Hoopoe
- Grey-backed Camaroptera
- Grey-backed Cisticola
- Grey-backed Fiscal
- Grey-backed Sparrow-Lark
- Grey-bellied Cuckoo
- Grey-breasted Martin
- Grey-breasted Mountain Toucan
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-browed Brushfinch
- Grey-capped Flycatcher
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cowled Wood Rail
- Grey-crested Cacholote
- Grey-crowned Flatbill
- Grey-eyed Bulbul
- Grey-fronted Dove
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Chachalaca
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Lapwing
- Grey-headed Lovebird
- Grey-headed Nigrita
- Grey-headed Swamphen
- Grey-headed Woodpecker
- Grey-hooded Attila
- Grey-tailed Mountaingem
- Grey Crowned Crane
- Grey Go-away-bird
- Grey Hawk
- Grey Heron
- Grey Kestrel
- Grey Monjita
- Grey Parrot
- Grey Plover
- Grey Seedeater
- Grey Wagtail
- Grey Wren-Warbler
- Greyish Baywing
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Groundscraper Thrush
- Guayaquil Woodpecker
- Guianan Trogon
- Guira Cuckoo
- Guira Tanager
- Gull-billed Tern