1. Monarch butterflies undergo a process called metamorphosis where they transform from an egg to a caterpillar, then to a chrysalis, and finally emerge as an adult butterfly. 2. Monarch butterflies feed on milkweed and nectar from flowers. They migrate long distances each year from Canada to Mexico. 3. Monarch butterflies are colorful and can be found all over the world, with over 20,000 different species. They undergo dramatic physical changes as they develop from egg to caterpillar to chrysalis to butterfly.