A: The cobra plant definitely fits the bill when you're talking about pure evil. Possibly one of the sneakiest carnivorous plants out there, this pitcher plant relative attracts insects with its long, bright, purple-spotted stalk. When a bug lands on the "cobra tongue" and follows the sweet smell of nectar into the bulb, it gets caught. But it doesn't die.

In fact, the insect is only killed once it tries to escape. Because the walls of the cobra bulb are translucent, an insect is given the false impression that it can simply fly its way out of the cobra's lair and go on to live a long, successful, multi-day life. Instead though, bugs end up flying fast, bumping against the wall, getting pin-balled down the stalk of the lily, and drowning in the cobra's bacteria-digesting pool lying beneath. Of course, tricking a fly is one thing. But tricking a monkey?

Supposedly, some Asian pitcher plants, known as nepenthes, have swallowed snakes and small monkeys. However, many botanists believe the largest item consumed by a pitcher plant of any kind to be a frog or small rodent. Still, they seem pretty cunning to us.