At first glance it may look like a fearsome snake but this rearing creature is actually a small caterpillar with a cunning means of defence.

Imagine if before you took each step, your guts lurched up into your throat. Well, caterpillars don't have to imagine-they take such drastic steps every day.

Imagine if before you took each step, your guts lurched up into your throat. Well, caterpillars don't have to imagine - they take such drastic steps every day.