If you can "locate" the approximate area of the clicks,you can set a pantyhose trap.Take a pair of pantyhose..cut a large enough piece to place a meaty chunk of food{something that won't break up like a silverside or some clams}in it..and tie knots on either end..or use the toe area of the hose..and a knot in one end.Tie a fishing line to the end..and also place something like a small chunk of LR in with the food,for weight.Drop near the rock at night,where you hear the sound.The mantis will try to get the bait,and his forearms will become entangled in the pantyhose.Do this every night,and remove by day,until he is trapped.Be careful removing him if you do catch him,he can slice open your finger!Good luck!
