Woolly Bear (Family Arctiidae)
Tiger moths are in the Family Arctiidae, a diverse group with worldwide distribution and 250 species in North America. Arctiid moths are unusual in that they have an organ on their thorax that vibrates to produce ultrasonic sound. They “vocalize” to attract mates and to defend against predators. Many of their caterpillars are fuzzy, earning a group name of woolly bears or woolly worms.