RodentR odents:
Rodents, such as mice and rats, thrive around human beings purely because we are so untidy and lax about waste disposal. The common rat or, as it is sometimes called, the brown or sewer or Norway rat did not originate in Norway, but probably arrived on ships from Russia early in the 18th century.  There are thought to be around seven million adult brown rats and five million adult house mice in Britain.

Millions of pounds are spent every year on lethal control - usually involving poisons.  As with most mammals the population densities of rats and mice are dependent on food availability - the aggression of dominant individuals preventing subordinates breeding when conditions start to become overcrowded. Group territorial behaviour further limits population densities.

The main problems encountered in urban areas involve rats and mice entering human habitation, damaging and fouling foodstuffs, gnawing electrical wiring and noisily scampering behind skirting boards and in lofts.



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