- Galah
- Galapagos Hawk
- Galapagos Mockingbird
- Giant Hummingbird
- Giant Wren
- Golden-browed Chlorophonia
- Golden Grosbeak
- Golden Pheasant
- Golden Swallow
- Grass Wren
- Great Blue Heron
- Great Cormorant
- Great Egret
- Great Grey Owl
- Great Grey Shrike
- Great Horned Owl
- Great Jacamar
- Great Kiskadee
- Great Shearwater
- Great Tit
- Greater Antillean Grackle
- Greater Prairie Chicken
- Greater Rhea
- Greater White-fronted Goose
- Green-tailed Warbler
- Green-winged Teal
- Green Aracari
- Green Broadbill
- Green Honeycreeper
- Green Imperial Pigeon
- Grey-breasted Wood Wren
- Grey-cowled Wood Rail
- Grey-crowned Tanager
- Grey-fronted Quail-Dove
- Grey-mantled Wren
- Grey Catbird
- Grey Parrot
- Grey Plover
- Grey Thrasher
- Grey Trembler
- Grey Wren
- Guam Kingfisher
- Gyrfalcon