The term 'Cousins of Gulls' refers to a group of seabirds known as Terns (5 letters). Terns are closely related to gulls and are found in many parts of the world. They have long, pointed wings and forked tails, and they feed on fish and other small aquatic creatures. Terns are highly migratory birds, and some species travel thousands of miles each year. They are also known for their graceful aerial displays and loud calls.