Manduca Sexta, the larva of the Carolina Sphinx Moth. I found this guy on my tomato plants as I was clearing them out of the garden. Also known as the Tobacco Hornworm or Goliath Worm. He was gorgeous! You can see his red horn (tail) in the second image. This is one of the features that distinguishes him from the Tomato Hornworm, whose horn is black.