- Gadwall
- Galapagos Dove
- Galapagos Flycatcher
- Galapagos Hawk
- Galapagos Mockingbird
- Galapagos Penguin
- Galapagos Petrel
- Gambel's Quail
- Gansu Leaf Warbler
- Gartered Trogon
- Gentoo Penguin
- Giant Conebill
- Giant Coot
- Giant Coua
- Giant Cowbird
- Giant Grey Shrike
- Giant Hummingbird
- Giant Laughingthrush
- Gila Woodpecker
- Gilded Flicker
- Gilded Sapphire
- Gilt-edged Tanager
- Glacier Finch
- Glaucous-winged Gull
- Glaucous Gull
- Glittering-bellied Emerald
- Glossy-black Thrush
- Glossy Antshrike
- Glossy Swiftlet
- Godlewski's Bunting
- Goldcrest
- Golden-bellied Flycatcher
- Golden-billed Saltator
- Golden-breasted Fulvetta
- Golden-browed Chlorophonia
- Golden-browed Warbler
- Golden-cheeked Woodpecker
- Golden-chevroned Tanager
- Golden-crested Myna
- Golden-crowned Flycatcher
- Golden-crowned Sparrow
- Golden-crowned Warbler
- Golden-eared Tanager
- Golden-faced Tyrannulet
- Golden-fronted Leafbird
- Golden-fronted Woodpecker
- Golden-green Woodpecker
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Woodpecker
- Golden-olive Woodpecker
- Golden-plumed Parakeet
- Golden-rumped Euphonia
- Golden-spotted Ground Dove
- Golden-tailed Sapphire
- Golden-tailed Woodpecker
- Golden-throated Barbet
- Golden-whiskered Barbet
- Golden-winged Cacique
- Golden-winged Parakeet
- Golden Eagle
- Golden Grosbeak
- Golden Myna
- Golden Swallow
- Golden Tanager
- Golden Vireo
- Gould's Toucanet
- Graceful Prinia
- Grass-green Tanager
- Grass Wren
- Grasshopper Buzzard
- Grasshopper Sparrow
- Grassland Sparrow
- Grassland Yellow Finch
- Great-billed Hermit
- Great-billed Mannikin
- Great-tailed Grackle
- Great Antshrike
- Great Argus
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Blue Turaco
- Great Crested Flycatcher
- Great Curassow
- Great Egret
- Great Frigatebird
- Great Grebe
- Great Grey Shrike
- Great Hornbill
- Great Horned Owl
- Great Iora
- Great Jacamar
- Great Kiskadee
- Great Lizard Cuckoo
- Great Myna
- Great Potoo
- Great Rosefinch
- Great Rufous Woodcreeper
- Great Shearwater
- Great Shrike-Tyrant
- Great Spotted Woodpecker
- Great Thrush
- Great Tinamou
- Great Tit
- Greater Ani
- Greater Antillean Bullfinch
- Greater Antillean Elaenia
- Greater Antillean Grackle
- Greater Bird-of-paradise
- Greater Hoopoe-Lark
- Greater Pewee
- Greater Rhea
- Greater Roadrunner
- Greater Sand Plover
- Greater Scaup
- Greater Thornbird
- Greater Wagtail-Tyrant
- Greater White-fronted Goose
- Greater Yellow-headed Vulture
- Greater Yellow Finch
- Greater Yellowlegs
- Greater Yellownape
- Green-and-black Fruiteater
- Green-backed Camaroptera
- Green-backed Tit
- Green-backed Trogon
- Green-backed Whistler
- Green-barred Woodpecker
- Green-billed Malkoha
- Green-breasted Mango
- Green-cheeked Parakeet
- Green-crowned Brilliant
- Green-crowned Plovercrest
- Green-eared Barbet
- Green-fronted Lancebill
- Green-headed Tanager
- Green-rumped Parrotlet
- Green-tailed Bristlebill
- Green-tailed Sunbird
- Green-tailed Towhee
- Green-tailed Warbler
- Green-throated Carib
- Green-throated Mango
- Green-winged Saltator
- Green-winged Teal
- Green Aracari
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Imperial Pigeon
- Green Kingfisher
- Green Manakin
- Green Peafowl
- Green Thorntail
- Green Warbler-Finch
- Greenish Elaenia
- Greenish Yellow Finch
- Grenada Flycatcher
- Grey-and-gold Warbler
- Grey-backed Cisticola
- Grey-backed Shrike
- Grey-barred Wren
- Grey-bellied Bulbul
- Grey-bellied Spinetail
- Grey-breasted Mountain Toucan
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-breasted Wood Wren
- Grey-breasted Woodpecker
- Grey-capped Flycatcher
- Grey-capped Greenfinch
- Grey-capped Pygmy Woodpecker
- Grey-cheeked Thrush
- Grey-chested Dove
- Grey-chinned Minivet
- Grey-cowled Wood Rail
- Grey-crested Cacholote
- Grey-crested Tit
- Grey-crowned Flatbill
- Grey-crowned Warbler
- Grey-crowned Yellowthroat
- Grey-eyed Bulbul
- Grey-faced Buzzard
- Grey-faced Tit-Babbler
- Grey-fronted Dove
- Grey-headed Babbler
- Grey-headed Batis
- Grey-headed Bristlebill
- Grey-headed Bullfinch
- Grey-headed Canary-flycatcher
- Grey-headed Cuckooshrike
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Lapwing
- Grey-headed Mannikin
- Grey-headed Nigrita
- Grey-headed Spinetail
- Grey-headed Tanager
- Grey-headed Woodpecker
- Grey-hooded Attila
- Grey-hooded Bush Tanager
- Grey-hooded Fulvetta
- Grey-hooded Parakeet
- Grey-hooded Sierra Finch
- Grey-lined Hawk
- Grey-rumped Swift
- Grey-streaked Flycatcher
- Grey Antbird
- Grey Catbird
- Grey Crow
- Grey Goshawk
- Grey Gull
- Grey Hawk
- Grey Kingbird
- Grey Monjita
- Grey Penduline Tit
- Grey Pileated Finch
- Grey Shrikethrush
- Grey Silky-flycatcher
- Grey Thrasher
- Grey Trembler
- Grey Wagtail
- Grey Whistler
- Greyish Baywing
- Groove-billed Ani
- Groove-billed Toucanet
- Ground Tit
- Guadeloupe Woodpecker
- Guanay Cormorant
- Guayaquil Woodpecker
- Guianan Cock-of-the-rock
- Guianan Streaked Antwren
- Guianan Toucanet
- Guianan Trogon
- Guianan Tyrannulet
- Guianan Warbling Antbird
- Guianan Woodcreeper
- Guira Cuckoo
- Guira Tanager
- Güldenstädt's Redstart