Monarch caterpillar eating Asclepias tuberosa at sunset on August 12, 2010, while nearby Asclepias viridis is a relatively rare late-bloomer of its species

Please click on image to ENLARGE wider view of monarch butterfly caterpillar in south Fayetteville, Arkansas.

Please click on lower image to view wider ENLARGED view of Asclepias viridis newly blooming on August 12, 2010, in south Fayetteville, Arkansas