Talpirid Mole Bait is used to kill moles. Moles are attracted to the earthworm like the bait and die within 48 hours after eating it. Even when earthworms are available, moles will prefer Talpirid. ** DISCLAIMER ** Depending on the weather during transit, it may get hot and the worms may melt. if this happens, simply get a bowl with hot water and put the tray that they come in a plastic bag to melt them back into their original shape.