Caterpiller gone missing

In the beginning of this week we found three caterpillar's. Two were black and orange and the other on was yellow, white, and black. The black and orange ones had their own jar and the yellow, white , and black one had his own jar. This morning we got up and the yellow, white, and black caterpillar was not in his jar he had disappeared! we looked all over the counter, floor, and all over, he was nowhere to be found.