The term 'Large Diving Bird' can be summarized by two crossword solutions: LOON (4 letters) and OSPREY (6 letters). The LOON is a large aquatic bird found in North America, Europe, and parts of Asia. It is known for its distinctive call and its ability to dive underwater to catch fish. The OSPREY is a large bird of prey found on every continent except Antarctica. It is known for its ability to dive into the water to catch fish with its sharp talons.