This campaign promotes the construction of toilets (usually pour flush pit latrine toilets). Its predecessors include the Victorian thunderbox, the bucket toilet and the pit latrine. Some lemurs defecate in specific areas, otherwise known as latrine behavior. Meadow voles form extensive colonies and develop communal latrine areas. The term "latrine" is still commonly used in emergency sanitation situations. A basic pit latrine can be improved in a number of ways. It is nowadays still commonly used in the term "pit latrine". One could argue that this is no longer a "pit" latrine in the stricter sense. For this reason they are subsumed under the term "pit latrine". This nest is kept clean, with wastes deposited outside the nest in a latrine area. The term "bucket latrine" is also in use. WaterAid encouraged local villagers to design and construct better latrine for themselves. Meanwhile, a runaway tank destroys the camp latrine and crashes nearby. Each house includes a main sleeping house, a guest house and a latrine. This became a breeding ground for bacteria, causing the spread of disease in the latrine.