Wife planted a bunch of butterfly bushes when we bought this house a few years ago. We've enjoyed watching Monarchs the last couple of years. With the extreme cold up here in the North Central part of the state, we were afraid that the cocoons would come to harm. Wife being the genius that she is, put together a butterfly cage on our front porch, then started clipping branches with the caterpillars on them. She placed the branches in the cage, and put a heat lamp on them every night. Well, they did, one at a time, start hanging from the top of the cage, upside down. Wife told me they kind of upchucked a green slime, which dripped down the caterpillar, and there you go, a cocoon. Pretty soon, they all turned into cocoons, and they were all hanging upside down, green goobers. After a while, one at a time, they started turning black. We were concerned, but one day one started wiggling, and lo and behold, it split open, and out popped a gorgeous monarch butterfly. It didn't move much, waiting for the wings to dry. Wife put slices of orange in the cage for it to drink. Pretty soon we had a whole bunch of monarch's. When the cage was getting full, we took it down, took it off the porch and turned them loose. All in all, we turned loose about 30 monarchs. What a blast. If you haven't tried it, go for it. It's well worth it.