Credit: Soma et al. The posture and and song are unmistakable and immediately identify an individual as a … The song is not that musical, again like other species of mannakins, the male Java Sparrow stretches his neck, and legs, standing in a more vertical position and utters a warbling, squeaky song, audible for some distance. A male and female Java sparrow performing a mutual courtship display. (from embargoed video) Male Java sparrows may …