caterpillars on maple trunk in upstate NY
I am visiting someone in upstate NY...can anyone tell me what caterpillar would infest the trunk of a maple tree at this time of year? The leaves look fine. It is a hairy caterpillar that camouflages well against the trunk (has brown/black/gray coloring). I saw several crawling up the tree, and a few dead ones. It looks like they might be living under the bark.