Madagascar hissing cockroaches normally come in a dark reddish brown or black coloring. It is hard to tell the difference between Madagascar hissing cockroaches and other large species of cockroach so it is recommended that you purchase your pet from a certified pet shop or dealer. The Madagascar hissing cockroach (scientifically named Gromphadorhina portentosa) is native only to the island of Madagascar. They are also commonly, and more simply,...