It's a scavenger hunt of sorts: the U-S Forest Service is hoping you can help them find the few ash trees which have managed to survive the invasion of a deadly Asian beetle in the hopes of one day reviving the state's ash population. Jennifer Koch with the USDA Forest Service says while more than 50-million ash trees in the upper midwest have been killed since the bug arrived. But, they've recently spotted a few survivors. The Forest Service has a new online reporting tool on its website where gardeners, hikers, and other wildlife enthusiasts can help identify surviving trees. Qualifying ash trees must be in natural forested areas, have a healthy canopy, and have not been treated with insecticides.