Western Pine Forests Hit by Bark Beetles (IMAGE) Dartmouth College Caption Large swaths of dead or dying Western pine forests have turned a reddish-brown after being attacked by mountain pine beetles. Credit Barbara Bentz Usage Restrictions Must credit Barbara Bentz. 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.