The term 'BIG BLACK BIRD' can be summarized by two crossword solutions: RAVEN (5 letters) and Greatcrow (9 letters). Ravens are large, BLACK birds that belong to the Corvidae family, which also includes crows, magpies, and jays. They are found in many parts of the world, including North America, Europe, and Asia. Greatcrows are also large, BLACK birds that belong to the Corvidae family. They are native to East Asia and are considered to be one of the largest members of the crow family.