Pipevine Swallowtail Caterpillars
Swallowtail. Swallowtail Caterpillars on Pipevine. Gainesville, Florida. 2013.
I am not sure, but I think these are Pipevine Swallowtail Caterpillars. They could also be Gold Rim, or Polydamas, Swallowtails. I'll see what they look like as they grow. They had just hatched when I took this photo. They will eat the egg shells, then set to work gobbling the leaves of their host plant, the Pipevine. Wonders in the front yard!