my husband took the picture of the catapillar which he said was as long as a small cucumber we live in montebello, california. What kind is it??? does it produce a huge moth or butterfly???
Your caterpillar is the green phase of the White-Lined Sphinx or Striped Morning Sphinx Moth, Hyles lineata. It is a large beautiful moth that is common in southern California. I see large numbers of moths attracted to the lights at USC when I teach night classes there. The caterpillar comes in both a green phase and a dark phase which are colored quite differently. Here is a site with nice images and information.