The term 'Knocking Bird' is a reference to the WOODPECKER, a bird species known for its distinctive knocking sound. Woodpeckers are found in many parts of the world and are known for their ability to peck at wood with their strong beaks. They are also known for their bright colors and unique markings. Woodpeckers are an important part of many ecosystems, providing food for other animals and helping to disperse seeds.