Yesterday we went to Windsor to visit our daughter. She has a regular 'butterfly factory' happening. She learned that only one in ten monarch caterpillars actually survives to become a butterfly, so she decided to help them along, so with our two youngest grandchildren, she goes out and looks for any caterpillars, or eggs on the milkweed, takes them home and puts them in clear containers in her kitchen. Every day she cleans out the bottoms of the containers and goes with her kids to gather fresh milkweed leaves. Once the caterpillars morph into cocoons, she carefully removes them from the lids of their containers, and tapes the silk at the top, onto the bottom of her spice shelf....where they hang for ten to 14 days before the butterfly inside is ready to emerge. Just before it does, the cocoon becomes dark, then completely transparent....
Before we left to go home, another two cocoons had started to turn dark, meaning the butterflies inside would be emerging the next day.
It was really interesting to see all the different stages of the Monarch life cycle. There were leaves with eggs, super tiny striped caterpillars no more than 1/4" long, bigger caterpillars, and finally, a long row of cocoons taped to the bottom of the spice shelf. Over forty individuals in all. Quite the exceptional learning experience for some very curious children (and adults)