Measurements and analyses of juniper fragments on bagworm cases reveal striking regularities that suggest the behavior that may produce them. Fragments are always attached at their extreme upper ends, and the great majority are oriented with their apical ends directed downwards towards the lower end of the bag. The proportion so oriented increases towards the cop of the bag, as does the average length of the fragments. Binomial analysis reveals no evidence of contagious orientation of adjacent fragments. It is suggested that the bagworm may not deliberately “decorate” its case, but that these fragments represent the remains of foliage anchored against the bag, so that the bagworm may feed with minimal exposure from its protecting case.