Cockroaches live in a wide range of environments around the world. The common pest species adapt to a variety of environments but prefer warm conditions found within buildings. Many tropical species prefer even warmer environments (like North Queensland) and do not fare well in the average common household. Cockroaches are mainly nocturnal and will run away when exposed to light. Cockroaches leave chemical trails in their feces, as well as emitting airborne pheromones for swarming and mating. These chemical trails transmit bacteria onto surfaces. Other cockroaches will follow these trails to discover different sources of food and water, and also discover where other cockroaches are living and hiding.