Each year, black and brown fuzzy caterpillars show up across Anacortes, but this year's arrival was so large that it caused some concern for many residents. As the numbers of caterpillars kept growing ...

DULUTH, Minn. (AP) -- Forest tent caterpillars munched the leaves off more than 7.7 million acres of Minnesota forests last summer, by far the highest total in the state's records. "It just seemed to ...

A hidden army reaches a crescendo about this time of year. Its tubular soldiers are largely out of sight and mind, but wage battle with vegetation on an epic scale. Mostly emerging under cover of ...