- Galah
- Gang-gang Cockatoo
- Garden Warbler
- Gentoo Penguin
- Giant Kingfisher
- Gila Woodpecker
- Glossy Black Cockatoo
- Glossy Ibis
- Goldcrest
- Golden-tailed Woodpecker
- Goliath Heron
- Goliath Imperial Pigeon
- Gosling's Bunting
- Grasshopper Buzzard
- Great-tailed Grackle
- Great-winged Petrel
- Great Blue Heron
- Great Cormorant
- Great Cormorant (lucidus)
- Great Crested Grebe
- Great Egret
- Great Grey Shrike
- Great Spotted Woodpecker
- Great Tit
- Greater Blue-eared Starling
- Greater Crested Tern
- Greater Flamingo
- Greater Honeyguide
- Greater Painted-snipe
- Greater Short-toed Lark
- Green-backed White-eye
- Green-tailed Towhee
- Green Oriole
- Green Sandpiper
- Grey-backed Camaroptera
- Grey-eared Honeyeater
- Grey-headed Albatross
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-tailed Tattler
- Grey Butcherbird
- Grey Currawong
- Grey Fantail
- Grey Heron
- Grey Kestrel
- Grey Petrel
- Grey Plover
- Grey Shrikethrush
- Grey Wagtail
- Greyish Eagle-Owl
- Greylag Goose
- Griffon Vulture
- Gull-billed Tern