All three have shed their caterpillar selves and settled in for the next 10-12 days – one on the milkweed plant, one under the windowsill, and one on the plastic pot holding the milkweed. It seems they only prefer wood but will anchor anywhere.
The transformation from caterpillar to chrysalis is faster than the transformation from chrysalis to butterfly. I missed all three! The world was so cruel before YouTube.