E-Mail IMAGE: A glasswing butterfly feeding at flowers in Costa Rica. The remarkable transparency of these butterflies allows them to be "invisible ", and the antiglare coating of their wings helps to... view more Credit: Nipam Patel WOODS HOLE, Mass. -- Many animals have evolved camouflage tactics for self-defense, but some butterflies and moths have taken it even further: They've developed transparent wings, making them almost invisible to predators. A team led by Marine Biological Laboratory (MBL) scientists studied the development of one such species, the glasswing butterfly, Greta oto, to see through the secrets of this natural stealth technology. Their work was published in the