Monarch butterfly nectaring on milkweed with monarch caterpillar nearby eating leaves

Please click on image to ENLARGE closeup photo of a monarch caterpillar. A few moments later, a monarch butterfly appeared on the same plant to nectar. See the two stages in the life of the monarch in the photo below.

PLEASE click on link to ENLARGE photo of monarch butterfly and caterpillar on tropical milkweed in the peace circle area of World Peace Wetland Prairie on September 5, 2008. The butterflies being produced now, and this caterpillar is to become one, will be the generation that travels to Mexico to spend the winter and return in spring. I cannot guess whether the butterfly in the photo will live to migrate or will simply participate in the mating that will produce the migratory generation. Comments on this subject are invited.