An invasive species that threatens ash trees has made an unwanted home across parts of the Adirondacks for the last few years. This week, Warren County says it’s showing up in some new places. WTEN reports Warren County warned landowners to keep an eye out for signs of emerald ash borer infestation, following signs of damage caused by the insect in Lake George and Queensbury. The invasive insect eats through ash trees, causing trees to die within 2 to 4 years of infestation.