Why do pigeons bob their heads?. Researchers have used various studies to find the mechanics and reasons. In a landmark treadmill experiment, the pigeon was put on the treadmill and its slow-motion footage studied. It was found that there were two main parts to a pigeon’s head movement, which the scientists called a “thrust” and a “hold” phase. In the ’thrust’ phase, the head is pushed forward, relative to the body followed by a ‘hold’ phase, during which the head is kept still in space. Head-thrusting helps pigeons to stabilise their vision of the moving world around them.
William Henry Gates III is an American business magnate, investor, author, philanthropist, and humanitarian. He is best known as the principal founder of Microsoft Corporation.