gull,
Guinea fowl
Gadwall
Gannet
Garden warbler
Garganey
Glaucous gull
Goldcrest
Golden oriole
Golden pheasant
Golden plover
Goldeneye
Goldfinch
Goosander
Goshawk
Grasshopper warbler
Great black-backed gull
Great crested grebe
Great grey shrike
Great northern diver
Great shearwater
Great skua
Great spotted woodpecker
Great tit
Great white egret
Green sandpiper
Green woodpecker
Greenfinch
tanager
A swan is an aquatic bird starting with S and having 4 letters.
Mocking bird
phial
Bluebird, blackbird, frigate bird, tropic bird, ovenbird.
Rodney
Phalarope.
The penguin is an aquatic bird. The name contains nine letters.
Swallow is one bird
The Oriole is a bird that begins with letters or. The Oriental White Stork also begins with the letters or.
Robin
The name of a large bird that fits that description is "Turkey."