Question: are all hairy caterpillars poisonous?
Answer: Caterpillars covered with hair or bristles, with one exception, are rarely poisonous. The “fuzzy-wuzzy” caterpillar that predicts winter cold is not poisonous nor is the gypsy moth or your tent caterpillar. ... Tufts of stiff white bristles at either end of its body exude a potent stinging chemical.