By Susan Milius
It’s not the sexual harassment. It’s the sunshine.
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2008/06/8225.jpg?resize=300%2C179&ssl=1)
That’s Idelle Cooper’s new take on the evolutionary force driving female Hawaiian damselflies to mimic males.
The long, slim bodies of male Megalagrion calliphya damselflies shine fire-engine red, says Cooper of Indiana University in Bloomington. For the species as a whole, about half the females have grass-green bodies and others sport the brilliant guy-red, Cooper reported.