A mousetrap is the most humane way of catching voles. Traps are not designed to kill living creatures. Mice or other rodents get in through special openings, which are immediately closed. Voles can’t get out of the trap, but they stay alive all the time. All you have to do is keep an eye on the traps, so the rodents don’t stay inside for longer than two days. Otherwise, they will die of thirst and hunger.