Waved Sphinx Moth larva

The large, green larvae usually have a long, pointed horn or spur atop the eighth abdominal segment and are so called hornworms." This horn is not poisonous and is quite harmless. The markings most often consist of a pattern of oblique white stripes on the sides. The fore part of the body is raised and held rigid when the insect is disturbed, the entire aspect becoming somewhat sphinx-like.