Ynghylch

The brown rat is an incredibly adaptable mammal and can be found almost everywhere in the UK, in any habitat, all it needs is shelter and food. Brown rats are omnivorous, eating pretty much anything, from fruit and seeds to human food waste, insects, birds' eggs or even small mammals. They are particularly common around towns and cities. Brown rats live in loose colonies and dig their own burrows. They are famously good breeders; a female brown rat can breed from around 3 months old, and has an average of five litters a year, each of up to 12 young.