Across the globe, it is thought there may be as many as 60 species of rat, but the most common in the UK is the brown rat, living for an average of 2 years. The gestation period for rats is 21 to 26 days and they can have up to 22 offspring at one time, but the average birth rate is 10, and by the age of three months they are ready to breed. It’s no wonder you can have an infestation almost overnight. When you choose Greystones Pest Control, you can rest assured that all your pest problems will be over. Contact us today for details.