|Monarch butterfly on a milkweed plant in northern Wisconsin.|
|Monarch caterpillar on a milkweed plant in my garden.|
Female monarchs lay their eggs on milkweed leaves and when the eggs hatch, the tiny caterpillars eat the leaves. After a few weeks, when the caterpillars are about two inches long, they stop eating, attach themselves to a leaf and cover themselves with a green shell called a chrysalis. Inside, the chrysalis, the caterpillar, now called a pupa, slowly transforms into a butterfly. After about two weeks, the beautiful butterfly emerges and the cycle of life begins again. (For a previous post with more about metamorphosis and a photo of a monarch chrysalis, click HERE.)
|Milkweed pods in the fall. (Illustration by Caroline Arnold)|
Monarch butterflies depend on milkweed. In recent years, the disappearance of milkweed in many rural areas as a result of development has had a deleterious effect on monarch butterflies and their numbers have plummeted. You can learn about planting milkweed in your area to help monarch butterflies at this NWF website.
In my book, Butterflies in Room 6, about a kindergarten class raising painted lady butterflies, you can learn more about butterfly development.