Bed bugs are mostly found in bedrooms as they generally feed at night when the host is asleep. When not feeding they live in the bed frame or cracks and crevices around the room. They do not harbour in the mattress or bedding material. They are reddish brown in colour turning blood red after feeding. The adult reaches approximately 5mm in length and passes through five nymph stages over a period of time to 128 days. The female lays her eggs in batches of 10 to 50, they are white in colour and deposited on various surfaces with a thin glue. They take on average 10 days to hatch and can mature into adults within one to two months given ample food. The female is then ready to start laying eggs. The speed of development depends on temperature and food availability. Surprisingly, bed bugs can live longer without food and can go without feeding for up to 140 days; the adult typically lives for about 10 months but can survive for a year or longer in cool buildings. This sensitivity to temperature means bed bugs will start to die if temperatures drop below 9ºC or rise above 36ºC. However, modern buildings have created ideal conditions for the bed bug with central heating and easy access to adjoining properties being commonplace.