Singing Spade-Leaf

Having split from its ancestor, the singing spade-leaf has developed an interesting survival strategy. In order to prevent itself and its fruit from being eaten before it has matured, its fruit have developed numerous hollows that twist and turn within them. When wind passes through these hollows, the plants produce various whistling tones that earn it its "singing" name. These sounds scare off potential herbivores until the fruit, and thus the plant itself, has fully matured, after which the hollows fill themselves out and the seeds within are ready to be eaten and dispersed.