Cockroaches which we may come into contact with in Auckland are all Thigmotactic. This is a word describing the behavior of the roach. For example a roach may be found hiding in between the window sill and frame of a window or you may notice them both large and small in around the top of the door and frame usually by the top hinge. Although it may appear the roach is hiding from you, it is in its nature to have a surface touching the top and bottom of its body. This inevitably provides both shelters from the elements, stealth and protection!
Toxin detection. Cockroaches have been said to be able to survive nuclear holocaust or at least one of the most likely of insects. This is as likely as many myths regarding insects, though it may be attributed to the roaches ability to sense toxins which may be harmful to its health. Many common insecticides need to be used with care and knowledge as they may have unintended results. Where roaches detect certain formulations they will avoid walking on or digesting them and avoid mortal contact.