These pigeons enjoy doing backward somersaults while flying. They are known as "Birmingham Rollers", named after the city where they were originally bred.

The Birmingham Roller is a very popular breed of domesticated pigeon that originated in Birmingham, England, where they were developed via selective breeding, for their ability to do rapid backward somersaults while flying.   Wiki    Music: Symphony No.9 in D Minor II by Ludwig Van Beethoven. Performed by the Vienna Philharmonic, directed by Felix Weingartner.