Destroyed Forest (IMAGE) U.S. Geological Survey Caption Mountain pine beetles have killed pine trees across vast areas of western North America since the late 1990s. Image of the northern Williams Range, Colorado, where beetles have killed more than 80 percent of mature lodgepole pine over many square kilometers. Credit USGS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.