Madagascar Hissing Cockroaches are known for the hissing sound they make by forcing air through spiracles, or respiratory openings, on their abdomen. This hiss can be made because of different situations: disturbance, mating, and fighting, but only males use the latter two. Another distinction between the two genders is the thicker antennae found on males. Unlike most cockroaches, these are wingless. Despite this, they are very good at climbing and can even climb up smooth glass.