The National Park Service and Maine Department of Agriculture, Conservation, and Forestry are hosting a free ash tree bark peeling workshop to teach people how to search for the emerald ash borer, an invasive forest insect pest 9 a.m.-mid-afternoon Wednesday, March 15, in the fire truck garage at Acadia National Park headquarters, 20 McFarland Hill Drive, which is located off Eagle Lake Road in Bar Harbor. This highly invasive exotic forest insect pest has not yet been detected in Maine, but it has been found in Massachusetts and New Hampshire.