Butterflies undergo a process called metamorphosis, starting as a caterpillar that eats food until it is ready for the next stage. The caterpillar then forms a chrysalis and transforms itself into a butterfly. Once emerged, the butterfly uses its hind wings and speed to evade predators while gathering energy from flowers. Though small, butterflies are difficult for predators to catch and not very nutritious if caught. Their colorful wings act as a warning to potential predators.