Marauding gangs of monkeys invade Rio.

From Treehugger:

In Rio de Janeiro, bold bands of marauding monkeys are turning to a life of looting and mischief. By the dozens, young capuchin monkeys have been descending the nearby hills to sneak into homes and steal fruit and other food from unsuspecting residents -- wreaking havoc in the process. "They come in, make a mess, break and throw everything onto the floor," says one distraught resident of Rio's primate-sacked South Zone. But local experts say that kind-hearted humans may be to blame for unleashing this proverbial barrel of monkeys.

Sure, in still-photos and wildlife documentaries, capachin monkey are undeniably adorable and seem rather harmless,but the recent slew of break-ins and thefts have familiarized locals with their more cunning qualities. In fact, an investigation from Jornal Floripa recorded some surprisingly well-orchestrated incidents of looting. By mimicking a birdcall, one monkey alerts countless others hidden that the latest home invasion will soon be underway.