A new invasive insect has turned up in Ada and Kootenai counties, prompting warnings from the state Department of Agriculture. The Japanese beetle, a half-inch-long, shiny metallic-green bug with copper-brown wing covers, destroys trees, rose bushes, stone fruits, garden and field crops, and its larvae or grubs destroy turf by feeding on the roots of grass. If you seen green and yellow traps, that's what they're for; Ag is also asking anyone who finds one of the bugs to place the dead specimen in a baggie and mail it in - there's more info here. The beetle first was introduced to the United States in plants imported from Japan.