This large and colorful caterpillar can cause painful skin eruption (dermatitis) when handled.
IO larvae possess many venomous spines (urticarial hairs) on their body and must be handled with care. The conspicuous red and white stripe which runs the length of the larva on each side is a good identification character.
IO caterpillars are found on cotton, oaks, poplars, and many other deciduous trees and herbaceous plants.
