Walk through a hardwood forest this month and it may seem more like October than July. Trees that normally provide cool shade have bare crowns with just a hint of green. And is the bark on that sugar maple moving? This is not a trick of the light: you are, in fact, in the middle of a forest tent caterpillar outbreak.
Despite the name, forest tent caterpillars don’t actually build tents like their cousins the eastern tent caterpillars. Instead, you’ll find them congregated on silken mats on tree trunks or branches. If you’re in an infested area, they won’t be hard to find. Sugar maples and aspen are often the favorite host species in the Northeast, as well as birch, cherry, basswood, and ash. » Continue Reading.