- Gabar Goshawk
- Gadwall
- Garden Warbler
- Garganey
- Giant Coot
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Gilded Barbet
- Glaucous Gull
- Glittering-bellied Emerald
- Glossy-black Thrush
- Glossy Flowerpiercer
- Glossy Ibis
- Goldcrest
- Golden-backed Weaver
- Golden-bellied Flycatcher
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-breasted Starling
- Golden-collared Toucanet
- Golden-crowned Flycatcher
- Golden-faced Tyrannulet
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-spotted Ground Dove
- Golden-tailed Sapphire
- Golden Eagle
- Golden Grosbeak
- Golden Tanager
- Goliath Heron
- Grassland Yellow Finch
- Great-tailed Grackle
- Great Antshrike
- Great Black-backed Gull
- Great Blue Heron
- Great Blue Turaco
- Great Bustard
- Great Cormorant
- Great Crested Flycatcher
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Frigatebird
- Great Grebe
- Great Green Macaw
- Great Grey Shrike
- Great Jacamar
- Great Kiskadee
- Great Potoo
- Great Reed Warbler
- Great Sapphirewing
- Great Skua
- 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 Kestrel
- Greater Sand Plover
- Greater Scaup
- Greater Short-toed Lark
- Greater Striped Swallow
- Greater Yellowlegs
- Green-and-black Fruiteater
- Green-and-gold Tanager
- Green-and-white Hummingbird
- Green-crowned Brilliant
- Green-headed Sunbird
- Green-tailed Trainbearer
- Green-throated Carib
- Green-winged Pytilia
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Imperial Pigeon
- Green Kingfisher
- Green Sandpiper
- Green Thorntail
- Green Wood Hoopoe
- Greenish Warbler
- Greenish Yellow Finch
- Grey-backed Fiscal
- Grey-backed Sparrow-Lark
- Grey-bellied Cuckoo
- Grey-breasted Martin
- Grey-breasted Prinia
- Grey-breasted Seedsnipe
- Grey-breasted Wood Wren
- Grey-capped Flycatcher
- Grey-capped Social Weaver
- Grey-capped Warbler
- Grey-cowled Wood Rail
- Grey-headed Bushshrike
- Grey-headed Canary-flycatcher
- Grey-headed Chachalaca
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Nigrita
- Grey-headed Silverbill
- Grey-headed Swamphen
- Grey-headed Woodpecker
- Grey-hooded Bush Tanager
- Grey-hooded Sierra Finch
- Grey-tailed Mountaingem
- Grey-winged Trumpeter
- Grey Crowned Crane
- Grey Francolin
- Grey Go-away-bird
- Grey Gull
- Grey Hawk
- Grey Heron
- Grey Kestrel
- Grey Kingbird
- Grey Plover
- Grey Wagtail
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Groundscraper Thrush
- Guam Kingfisher
- Guanay Cormorant
- Guayaquil Woodpecker
- Guianan Woodcreeper
- Guira Tanager
- Gull-billed Tern
- Gyrfalcon