Tussock moth caterpillar

To insect lovers, the Tussock Moth caterpillars are known for their striking tufts of hair, or tussocks. Many species exhibit four characteristic clumps of bristles on their backs, giving them the appearance of a toothbrush. Some have longer pairs of tufts near the head and rear. Judged by looks alone, these fuzzy caterpillars seem harmless, but touch them with a bare finger and you'll feel you've been pricked by fiberglass.