NathanVaughn Loved all the info in these comments. I get these or the tomato horn worms in my garden. I'll look more closely for a definite ID next time.
lori.tas I've revised this ID to the Waved sphinx (Ceratomia undulosa), given the location and the color of the tail spike.
lori.tas Five-Spotted Hawkmoth (Manduca quinquemaculata) aka the Tomato horn worm. http://en.wikipedia.org/wiki/Manduca_quinquemaculata
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