Stumbled across this little guy in HortPark feeding on the leaves of the Congea tomentosa (Shower orchid or Wooly congea).
In the US, these caterpillars are called "hornworms" because they have a conspicuous horn or spine on the top of the last abdominal segment. Hornworms are the caterpillars of sphinx moths and are classified in the moth family Sphingidae, in the order Lepidoptera (butterflies and moths).
The name "sphinx" is probably in reference to the sphinx-like position that some of the caterpillars assume when disturbed.
