Gull.
As in Sea Gull without the Sea
You might be thinking of a Gull.
GANNET
Starts with a
Erne, Also known as the sea eagle.
Xeme
'Wren'
swan
The Dodo Bird
Coot.
The dodo bird.
Antz
erne
Some sea birds with four letters are: - Erne - Tern - Gull
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