COCKROACH
 There are about 4,000 species of cockroach across the world and around 30 of them live in households. In Korea there are 8 spices and 6 of them are proven to be living in residential areas.
It was initially under the category of grasshopper but now it belongs to cockroach category and simply called a roach.
This nocturnal pest stay under laminated cover of floor, sink, inside doorknob, behind a fridge, and inside a water-cooler.
A probing look at fossil says they have not really changed that much from 350 million years ago as they can endure the radioactive waves which can terminate mammalian, and survive for a month only with water. It can live off paper, leather, hair, spit, coagulated blood, trashes, carcass and food, and in this regard, they can effectively carry diseases and germs.
They produce an ovisac of thirty or forty nit in half a month, thus in a single year, one can multiplex to 400,000. They grow by eating their own dung. As they have less digestive enzyme in its infancy, they absorb the enzymes from the dung of their own or other animals..
They originally are tropical insects and therefore like warm places. They live behind fridge or electronic oven and they gnaw the computer chips or the electronic wires thus causing malfunctions.
They copulate several times throughout their lifetime, but with only one time of copulation, they can produce several ovisacs. In cases, they are capable of parthenogenesis which can produce only female roaches. Nits inside ovisac grow into larva and come out, which is a distinctive feature of its kind, and until then they are carried inside the ovisac attached to a the female body.
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