The next day, Nat tells his fellow workers about the night's events, but they give his story no credence. As Nat later walks to the beach to dispose of dead birds, he notices what appear to be whitecaps on the sea, but it is actually a great line of seagulls waiting for the tide to rise. When Nat arrives home, his concerns about the aggressive behaviour of the birds are confirmed by a radio report saying that birds are massing all over Britain and some people have been attacked, presumably because of the unnatural weather. When Nat notices more birds, including the gulls, above the sea waiting for the tide he decides to board up the windows and chimneys of his house as a precaution.