Anatis labiculata (Giant Ladybug) on a Milkweed (Asclepia syriaca) leaf. This is an arboreal species of ladybug so I suspect it fell from the trees in the windbreak nearby. The identity of this species was confirmed at Bug Guide https://bugguide.net/node/view/1613933
''Anatis labiculata'', known generally as the fifteen-spotted lady beetle or fifteen-spotted ladybird beetle, is a species of lady beetle in the family Coccinellidae. It is found in North America.