As of yesterday morning, nobody home.
That's meconium in the bottom, a red liquid made up of leftovers from the transformation process. Human and other mammal babies have a meconium, too: intestinal contents developed while they're in the womb and expelled soon after birth.
We noticed just in time to see the first flight, over the back fence and into the woods behind the house.
From this perch, it fluttered away - no doubt to look for flowers and its first meal.
I don't especially care for these pagoda plants (they aren't native), but they support butterflies and hummingbirds so I let them stay.
We'll be keeping an eye out for "our" butterfly!
Meanwhile, the pipevine is putting out new leaves, ready for the next batch of caterpillars.