A dead adult mountain pine beetle is displayed on a piece of tree bark April 4, 2010. Colorado has 3 million acres of forest killed by the tiny bug. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES)