Hi I was reading your blog about beetles. I've had several trees die and others continue to die. I think the Douglas fir beetle is the culprit for my firs but what could be killing my hemlock. I had the extension service come out almost two years ago and the state forester. They did not believe that bugs were killing the trees. They thought overcrowding, or compacted soil from my two horses. I'm having the property logged and thinned but more trees keep dying. I'm outside of Colton Oregon. Clackamas county. Any ideas would be helpful. I did find a yellow and black insect, beetle today.