The term Gull Cousin is a collective name for two species of seabirds, the TERN (4 letters) and the ERNE (4 letters). Both species are closely related to gulls, hence the name Gull Cousin. The TERN is a medium-sized seabird with long wings and a deeply forked tail, while the ERNE is a large seabird with a long neck and a hooked bill. Both species are found in coastal areas and feed on fish and other aquatic creatures.