I enjoyed a field trip this weekend in the coastal plain of South Carolina (near Orangeburg). A few things I learned were how to distinguish a Viceroy from a Monarch and caterpillar poop from butterfly eggs. It was fun to see all kinds of butterflies and caterpillars and plants, as well as this tree frog.
The most common caterpillar we saw was of the buckeye butterfly:

They loved to munch on the Gerardia, or false foxglove: