Within 20 generations the 90% of the males on Kauai have "flatwings", it has reduced predation since the fly cannot locate the males and the males have adapted their behaviour, exploiting males that can make sound to attract mates for them.
The 90% of the males on Kauai have "flatwings". This is within 20 generations. It has reduced predation. The fly cannot locate the males. The males have adapted their behaviour. The males were exploiting males. These males can make sound to attract mates for them.