Rare prehistoric flutes dated to 10,000 BCE, found in northern Israel's Hula valley, were made from bird bones and could imitate the calls of predatory birds. This surprising find was published on Friday in the peer-reviewed journal Nature Scientific Report, providing rare direct evidence for sound-making instruments from the Paleolithic age . The seven perforated bird bones, called aerophones in the scientific literature, were found in the late Natufian site of Eynan-Mallaha, in the Hula Valley in northern Israel.