Something I learned today: a chrysalis is a pupa that hangs. A cocoon is a pupa that does not. I have usually used these two terms interchangeably.
I set a black swallowtail chrysalis on the ledge in our art/science room this fall, after determining that it was a dud. I did not assume it was an overwintering swallowtail since its sister hatched out just perfectly. However, with sustained warm days and nights (and my ignorance in leaving it out on a shelf), it hatched yesterday during some 75 degree weather. I found it on the floor, crumpled and alone. I was able to get it hanging, in order for it to pump up its wings, and I performed a little spiderweb removal to allow the right hindwing to properly fill with fluid. Within an hour, it was gorgeous. I have a paper towel moistened with 1 part sugar/10 parts water as well as half an orange. I do know that swallowtails can go several days without nectar at the beginning of this stage, but I felt it needed a little coaxing to eat this morning. So we carefully uncurled its proboscis with a pin and encouraged some slurping on the orange. She ate for several moments, was restful for a while, and now is quite active.