The term 'long-winged sea bird' can be summarized as a GULL, which is a four-letter word. Gulls are seabirds that belong to the family Laridae and are known for their long wingspan. They are typically found near coasts and on inland waters, and they feed on fish, crustaceans, and other small animals. Gulls are also known for their scavenging behavior, often stealing food from other birds or humans.