Monarch coming . . .

I saved milkweed in several places in my yard. The closest was behind the garage. I've checked them frequently for Monarch activity, both this year and last. Saturday I finally spotted this:

The Monarch

I seem to learn things slowly. Take the Monarch butterfly, for instance. A few years ago I learned that this beautiful butterfly likes milkweed. My mother shared this with me as she was coaxing me into helping her transplant some milkweed for the Monarchs and some thistles for the Goldfinches. (What would grandpa have said about transplanting weeds to her garden? One can only wonder.) The caterpillar eats milkweed to make itself unpleasant for predators. A side note: I had only ever known about milkweed pods. I didn't realize they had flowers!



Somewhere along the way I also learned that the Monarchs migrate to Mexico each year from the mid and northern United States. That, in itself, is an amazing feat. However, when you consider the life cycle of the Monarch, it becomes downright Magical.

Monarchs generally live about six to eight weeks. The egg stage is about four days, the caterpillar stage is about 14 days, the chrysalis stage is about ten days, and the butterfly stage is about 2-6 weeks.

There are four generations in a year. The first generation returns to the north, and does the eggs/caterpillar/Chrysalis/butterfly thing. Generation two and generation three follow, about every two months. Generation four hatches in September/October, and it is THIS batch that migrates.

Now I wanna know: how DO they know?