05/22/2014 04:17 pm ET Updated Dec 06, 2017

The Magical Migration of the Monarch

Everyone loves a monarch butterfly! They are a magical symbol of summertime, transformation, and the health of the environment. But let's face it; they're a bit complicated to understand. Even though I've long appreciated how amazing they are, I didn't get how the whole monarch migration thing worked. And why do they need milkweed? Is that all they eat, or what?

So I did a little research (what did we do before Google?) and was even more amazed by the magic of their precious lives. So I'm going to try to explain it all for you here (focusing on the eastern monarch) so that you too can appreciate just how special these butterflies are and how much their survival depends on your help.

1. First of all, it takes FOUR GENERATIONS of monarchs to fly from Mexico to their final East Coast destination. That's four generations in one summer! And each generation along that migratory path needs the same few things.

2. What consists of one generation of a monarch? A monarch leaves Mexico, mates, lays eggs; a caterpillar is born and eats until it feels the urge to turn into a pupa or chrysalis, then it comes out a butterfly and repeats the process, flying north the whole way. This happens four times every summer.

3. Baby monarch caterpillars can only eat one thing: milkweed! Milkweed is like infant monarch baby formula. In fact, milkweed is toxic to almost every other bird, animal, and insect. So it really only fits into the food chain as a food for baby monarch caterpillars (which are yellow-, black-, and white-striped little cutie pies), and it makes those adorable little caterpillars distasteful to predators. This is why it's important for us to make sure there is milkweed all the way from Mexico to Maine! And maybe even Canada.

4. Milkweed is useful for other things, too, by the way. The feathery seeds can be used for stuffing things (Native Americans used it as diaper padding), the stalks can be made into rope, and the plant has a number of medicinal uses, as well.

5. Back to the monarchs. Adult monarch butterflies eat nectar from any tasty flower. That's why it's good to create a butterfly garden for all the butterflies, filled with lots of delicious flowers. They need their strength to fly the next leg of their journey (and to mate and then lay eggs, preferably on milkweed so when their babies are born they have something to eat).

6. Then the miracle happens: The monarchs of the final, fifth generation are super butterflies! This last generation flies ALL THE WAY BACK TO MEXICO themselves! That's, like, thousands of miles!

7. Some more interesting facts: Monarchs are found all over the world, but in areas where it's warm, they don't migrate--or they take a much smaller round trip. Monarchs have become especially fond of Bermuda and Spain, since people have started planting milkweed as an ornamental plant in those countries. Monarchs have even been known to fly across oceans!

How do they know the way? Well, that's the great mystery and a reminder of just how much we don't know about nature, the universe, and life in general. I have a few theories, but those will have to wait for another day. In the meantime, enjoy, protect, and nurture these magical creatures.

Endnote: This week at, in honor of the monarch butterfly, there is a game you can play to find the monarch on the site and get free shipping on any order. Plus, we now sell certified-organic milkweed seeds so you can plant a monarch nursery of your very own.

For more from Maria Rodale, visit