I found three Bark Cockroaches on the underside of a fallen branch I was clearing away. When I moved the branch to a better location for photographing they remained motionless. Once the sun began to warm them they started to move, although just to the underside of the branch out of the direct sun. They then flattened themselves against the bark again, to once again resume being motionless. After a few goes of rolling the branch over to get a better shot, all three of them, at different times, fell off the branch to the wooden deck where they crawled through the cracks to disappear.