Three monarch butterflies have been hanging around our gardens this past couple of weeks (two seem to be a couple, flitting around everywhere together), and one of them laid some eggs on the underside of one of the leaves of this plant above. Those eggs quickly developed into ravenous caterpillars that proceeded to defoliate the plant, before moving on elsewhere. Some ended up on another type of milkweed three feet away, but so far none yet on still another type some ten feet away, where I half expected them to be, given multiple plants. Elsewhere near our home, there is no sign yet of any monarchs or eggs on a profusion of milkweed plants at the boat landing; they were inundated with them last year.
Addendum on 8/12: they finally found the milkweed ten feet away.
Addendum on 8/17: the eggs/caterpillars were actually those of milkweed tussock moths, otherwise known as milkweed tiger moths. See next post.