This green metallic wood-boring beetle is one of our easiest to recognize. Adults feed on foliage of injured, dead, and dying trees. The larvae bore in the wood of aspen and cottonwood, making distinctive flattened burrows; the larva have rather large flattened heads. The “metallic” part of common name stems from the fact that these beetles do look, and feel like they are made of metal. Even putting an insect pin through the tough exoskeleton can be a challenge. Because of their wood-boring nature, many of these beautiful beetles are considered pests.