They are also vociferous with a shrill whinnying call. They have a distinctive shrill whistle followed by a rapid whinnying call. Zebras communicate with each other with high-pitched barks and whinnying. Horses displayed increased whinnying, running, and jumping after the event. The breeding call has been likened to a horse whinnying. Toward the end of the piece, a trumpet imitates the sound of a horse whinnying.