A roar is heard from the Atlantic Ocean. From the horizon and beyond fulmars, arctic terns and herring-gulls are heading out.
A couple of years ago scientists in Iceland started to discover that the huge colonies of birds suddenly started to disappear.
The predominant cause of the deaths is the changing climate. As the Atlantic Ocean gets warmer the currents change and so is the abundance of the bird´s prey.
This is a story about change.
About what happens as the tide rolls in.
The arctic tern is one of the birds that is declining at Iceland.
The colonies of fullmars are under threat.