The name bark beetle is quite appropriate for these insect as it's best know as the species that reproduces and lives in the inner bark of trees. In this alpine environment, various species of bark beetles pose a threat to our Douglas-firs, spruce and sub apline fir tree populations. Unlike the Western tent caterpillar and spruce budworm, bark beetles attack the vascular systems of trees, crucial conduits through which water and nutrients flow. In addition, these notorious pests carry disease organisms that further affect the tree.

Although bark beetles are usually attracted to trees already weakened by drought and stress, they can attack and kill healthy trees. Once a tree shows signs of bark beetle infestation, it is usually too late to do anything to save the tree.