Big Poplar Sphinx Moth or Modest Sphinx (Pachysphinx modesta) attracted to lights for Bog BioBlitz at Welcome Center in the Sax-Zim Bog (photo by Sparky Stensaas/www.ThePhotoNaturalist.com)
My boys found this caterpillar on a sand beach near West Beach Resort. We have never found a caterpillar on a beach before. We've gone through several caterpillar guides for Washington state and have not been able to identify it. The horn was a blueish-green and it did not have the diagonal stripes that many horned caterpillars have, except for the one stripe visible extending down the body near the horn. Ideas?
Found crawling on the ground, moved to a willow branch where it started feeding.
Location: Makunda Christian Hospital, Karimganj District, Assam
Date: 3rd July 2016
Equipment: Nikon D800 with Micro-Nikkor 105mm