In pictures: Britain's most dangerous invaders, a  Daily Telegraph slide show, sounds like it's about the London Bombings of 2005, or the recent London Riots, which also spread to other cities.

Or it could be about the Jamaican gangs, the Islamic gangsters who are taking over whole neighborhoods and even cities.

But no...it's about the American mink, the American grey squirrel, the Zebra mussel, and 12 other non-native animal species introduced to Britain from other countries.

The obvious question is "When was the last time a Zebra mussel tried to burn down a city or loot a shop?"