tiger moth

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of numerous, often brightly colored moths of the family Arctiidae, characteristically having wings marked with spots or stripes.

from The Century Dictionary.

• noun A moth of the family Arctiidæ, as Euprepia caja and E. plantaginis, whose larvæ are known as bear-caterpillars and woolly bears.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology A stout-bodied moth (species) of the family Arctiidae

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun medium-sized moth with long richly colored and intricately patterned wings; larvae are called woolly bears