There used to be tons of this growing around my parents house as a kid. We would hatch the little yellow eggs they laid on the bottoms of the leaves into caterpillars and release the monarchs after they emerged. There's no more milkweed there ... ,😥
http://www.wpr.org/usgs-1-8b-new-stems-milkweed-needed-sustain-monarch-population
The tiny yellow eggs -
The caterpillar ...
Crysallis to Butterfly ...