Spoiler alert: that 1:1 ratio is mostly nonsense. Experts who actually study these furry neighbours say the real number is much, much lower. Most current estimates from pest control pros suggest a population between 500,000 and 1 million rats.
Still, half a million is a lot of whiskers and tails. To put it in perspective, that’s about the same number of people who live in a city like Glasgow. Imagine every single person in Scotland’s biggest city scurrying through your alleyway—kind of makes you look at that bin a little differently, doesn’t it?
Why So Few (Compared to the Myth)?
The old myth came from a dodgy 1909 study about brown rats in the English countryside. It was never meant for cities. Modern research, like the super cool "Rat City" project in New Orleans, shows urban rats have smaller home ranges and rely on our messy habits, not magic numbers.
Plus, think about it: if there were 9 million rats, we’d be tripping over them constantly. They’re sneaky, but not that sneaky. Actually, a single female rat can have up to 84 babies a year, so without predators and pest control, London would be a furry ocean pretty quickly.
Rat map of UK reveals worst rodent infestations across the country
