Cockroaches are one of the most successful animals known in the evolution of the planet.
There are more than 3,500 cockroach species existing in the world. Cockroaches are now classified in the insect order Blattaria. They are separated into five families based on their shared characteristics, namely, Blattidae, Blattellidae, Cryptocercidae, Polyphagidae and Blaberidae. In general, cockroaches are tropical and live outdoors. Of these, the Oriental cockroach is of great public importance.