The Atlantic Bird is a term used to refer to two species of seabirds, the AUK (3 letters) and the ERNE (4 letters). Both species are found in the Atlantic Ocean and are known for their long wings and webbed feet. They feed on fish, crustaceans, and other small aquatic animals. The AUK is a member of the Alcidae family and is found in the North Atlantic, while the ERNE is a member of the Falconidae family and is found in the North and South Atlantic. Both species are important to the marine ecosystem and are protected by international law.