First in Rocky Mountain State Park, then in Yellowstone, as well as points in between, we noticed a great number of pine trees had died; tall, brown tree trunks and branches standing on the hillside, or sliding down the mountain slopes. We quickly became educated about the pine bark beetle, currently found from Montana through New Mexico. From our own experience we noticed more damage in Rocky Mountain National Park than we did as we traveled further north, though the pine beetle had definitely moved north ahead of us. These beetles burrow through the outer bark of conifers, lay eggs which hatch into hungry beetle larvae, which then consume the living inner bark of the trees. Currently western pine forests are affected, especially lodgepole pine. There are 17 species of native bark beetles in Rocky Mountain National Park alone. Hard winters can kill beetle eggs and larvae which winter under the outer bark, but it has to be bitterly cold to work. Unfortunately the average winter temper...