- Gabar Goshawk
- Gadwall
- Garden Warbler
- Gartered Trogon
- Giant Antpitta
- Giant Hummingbird
- Giant Kingbird
- Giant Kingfisher
- Gilded Barbet
- Glacier Finch
- Glaucous-winged Gull
- Glaucous Gull
- Glistening-green Tanager
- Glittering-throated Emerald
- Glossy-black Thrush
- Glossy Ibis
- Glowing Puffleg
- Golden-bellied Flycatcher
- Golden-bellied Gerygone
- Golden-billed Saltator
- Golden-breasted Bunting
- Golden-breasted Puffleg
- Golden-collared Tanager
- Golden-crowned Flycatcher
- Golden-crowned Tanager
- Golden-crowned Warbler
- Golden-eared Tanager
- Golden-eyed Flowerpiercer
- Golden-headed Cisticola
- Golden-hooded Tanager
- Golden-naped Tanager
- Golden-olive Woodpecker
- Golden-tailed Sapphire
- Golden-tailed Woodpecker
- Golden-winged Cacique
- Golden-winged Manakin
- Golden Eagle
- Golden Tanager
- Goliath Heron
- Gould's Inca
- Gould's Jewelfront
- Grass-green Tanager
- Grass Wren
- Grassland Sparrow
- Grassland Yellow Finch
- Great-billed Hermit
- Great-tailed Grackle
- Great Black Hawk
- Great Blue Heron
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Grebe
- Great Grey Owl
- Great Hornbill
- Great Kiskadee
- Great Myna
- Great Potoo
- Great Reed Warbler
- Great Sapphirewing
- Great Sparrow
- Great Thrush
- Great Tit
- Great White Pelican
- Greater Ani
- Greater Antillean Grackle
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Flamingo
- Greater Kestrel
- Greater Necklaced Laughingthrush
- Greater Painted-snipe
- Greater Scaup
- Greater Short-toed Lark
- Greater Wagtail-Tyrant
- Greater Yellow-headed Vulture
- Greater Yellowlegs
- Green-and-gold Tanager
- Green-and-white Hummingbird
- Green-backed Camaroptera
- Green-backed Trogon
- Green-barred Woodpecker
- Green-breasted Mango
- Green-crowned Brilliant
- Green-headed Tanager
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Kingfisher
- Green Thorntail
- Green Warbler
- Grey-and-gold Warbler
- Grey-backed Camaroptera
- Grey-backed Hawk
- Grey-backed Sparrow-Lark
- Grey-breasted Prinia
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-capped Greenfinch
- Grey-capped Pygmy Woodpecker
- Grey-cheeked Fulvetta
- Grey-chinned Minivet
- Grey-cowled Wood Rail
- Grey-crowned Yellowthroat
- Grey-eared Brushfinch
- Grey-fronted Dove
- Grey-fronted Quail-Dove
- Grey-headed Gull
- Grey-headed Kite
- Grey-headed Swamphen
- Grey-hooded Attila
- Grey-hooded Bush Tanager
- Grey-hooded Parakeet
- Grey-lined Hawk
- Grey-tailed Mountaingem
- Grey-tailed Tattler
- Grey Catbird
- Grey Go-away-bird
- Grey Gull
- Grey Heron
- Grey Wagtail
- Greyish Baywing
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Groundscraper Thrush
- Guanay Cormorant
- Guira Cuckoo
- Gull-billed Tern
- Gyrfalcon