The term 'Fork-tailed Flier' is a reference to the TERN, a seabird with a distinctive forked tail. The TERN is a migratory bird that can be found in many parts of the world, including North America, Europe, and Asia. It is known for its graceful flight and its ability to dive into the water to catch fish. The TERN is also an important part of the food chain, as it feeds on small fish and other aquatic creatures.