About this Caterpillar:Though most stinging caterpillars become moths, this prickly larva will one day be a beautiful mourning cloak butterfly. Spiny elm caterpillars live and feed in groups.
Where It's Found:Wetlands, forest edges, and even city parks from northern Florida over to Texas, and north well into Canada.
What It Eats:Elm (surprise!), birch, hackberry, willow, and poplar.
Group:Brushfoot Butterflies (Family Nymphalidae)