Discover Magazine says, "The WIPs cast the behavior and evolution of insects in a new light. Flies often use their wings to signal to each other during courtships, using movements that are probably accompanied by brilliant flashes of color. As another example, female fig wasps hold their wings upright when they arrive on a fig. As they squeeze through a narrow entrance in the fruit, the wings break off and the wasp sticks them into place with a tiny drop of glue. Viewed with WIPs in mind, the wings could act as a colorful “Do Not Disturb” sign, telling other wasps that the fruit now has a tenant."
Full article: http://www.environmentalgraffiti.com/news-fairy-wings