Could you please help me identify this caterpillar which is a about 3″ long, has a horn at the rear end. It is feeding on a Four O’clock plant0 the flower of which is supposed to bloom about 4::00 pm every day. Thanks for your help.
This is a White-Lined Sphinx Caterpillar, Hyles lineata. It is a highly variable caterpillar with at least three distinct color variations.