As one of the world's most ancient bugs, the cockroach is virtually indestructible. The cockroach is actually closely related to the termite. The world's largest cockroach species can grow almost to a scary 12 cm, while the tiniest measure not more than a few millimetres.
Different cockroach species dominate different areas. In Australia, there are approximately 400 cockroach species, however, only about 6 species are considered serious pests of urban households and businesses. There are the native species, which are often larger than the pest species, move considerably slower than the pest species, and do not require treatment. These native species of cockroaches are an important part of our unique bio-diverse ecosystem and should be left alone.