Puss Moth Larva, England, 1997Photograph by Darlyne MurawskiA puss moth larva disposes of its old skin (left) and head capsule (right) after molting on a leaf in England. These disarmingly colorful critters actually pack some potent weaponry. A gland on the moth's thorax sprays formic acid, and its upright rear appendages sport noxious, pink tentacles.