Well, I'm no expert on Hornworms, or Caterpillars in general, but if I had to guess, I'd say that this might be a type of color mutation, like reverse albinoism. As long as it's still eating and behaving normally, there shouldn't be anything to worry about.
mysikduk
Feb 6, 2004 2:02 PM
It is a true albino. The lack of pigment in Hornworms causes the green color.
so_confused
Feb 23, 2004 7:05 PM
Rating: 5/5
just like my name says, "Im So CoNFUSED!" lol, r they supposed to be greenish or are they supposed to be black!!?
bugmankeith
Jun 12, 2007 4:52 PM
Rating: 5/5
They are normally green, and no, that's not dying. When the weather is cold and some hornworm eggs hatch late in the year, they hatch out dark colored instead of the usual green. I dont know the purpose, but that one hatched towards the end of the breeding year probably.
I'm interested to know if the adult moth also differs in color?
Those are Tobacco hornworms because their "horn" is red, Tomato hornworm horns are black.
