To sing or not to sing?
In a strange turn of convergent evolution, crickets on two Hawaiian islands have become non-singers.
The silent insects were originally found ten years ago and had evolved physically different wings which meant that they were unable to produce that familiar cricket sound. The mutation has happened and spread because of the arrival of flies which lay eggs on the crickets, locating them by the sound they make. When the eggs hatch the larvae burrow into the cricket and eat it. Now that the insects are silent those pesky flies can no longer locate them.