Hissing Cockroach (Gromphadorhina portentosa)Insects, InvertebratesA loud hiss is enough to frighten away most predators. When disturbed, this fascinating roach hisses by forcibly expelling air from the spiracles or breathing pores on its first abdominal segment. Unlike many roaches, it is flightless and crawls rather than runs. The female gives live birth to many young. Video