 Gulls have been used as metaphors, as in "Jonathan Livingston Seagull" by Richard Bach, or to denote a closeness to the sea; in "The Lord of the Rings", they appear in the insignia of Gondor and therefore Númenor (used in the design of the films), and they call Legolas to (and across) the sea.Pelicans have long been associated with mercy and altruism because of an early Christian myth that they split open their breast to feed their starving chicks.The following are the groups of birds normally classed as seabirds.