Video - Beware of the cow, and of the emu, and of the penguin, and...

Everybody knows that cows can become quite aggressive sometimes, but what about llamas, emus and even ... penguins?

Cows are traditionally docile animals, but they can be pretty nasty sometimes. But how dangerous cows in the countryside really are? Everybody knows that they can become quite aggressive when protecting calves. And what about llamas, emus and even ... penguins?! Not to talk of bisons, monkeys and kangaroos!