The caterpillars, known as browntail moths, have tiny hairs that can cause skin rashes and even breathing issues for some people.The caterpillars, known as browntail moths, have tiny hairs that can cause skin rashes and even breathing issues for some people.Caterpillars, Butterflies and Moths, Invasive Species, Cape Cod (Mass), Maine, Waterville (Me), Browntail moths, Poisoning and PoisonsRead More