Here are two of our hissing roaches. One of my son’s favorites, they are handled often. They are called Madagascar hissing cockroaches because they hiss through the spiracles along their abdomen, creating a hissing noise. Those spiracles are actually how they breathe, kind of like human nostrils. However, they do not sense smell through their spiracles, that is what their fuzzy antennas are for! The tiny hairs that line their antennae, called sensilla, are used to detect smells.
