Got a pest control company that gives me a call just about once a week for swarms, cut outs or trap outs. This one was at Target store next to east town mall. They are in the wall. Big hollow space between the cinder blocks, kind of built funny......fake stone, four inch cinder block, about a six inch space, another four inch cinder block, styrofoam insulation and then sheet rock. There is a cap block on top or the cinder blocks and that stopped their upward movement. Set the trap out today and was it ever HOT, the evening sun baking us at 96* F and all of the heat coming off of the block wall and sidewalk. Took about 5 1/2 hours to get them set up and all of the holes plugged. Plenty of water and shade breaks.