Fat, Green Worm
January 23, 2010
We came across this while camping near Lehman Caves at the Great Basin National Park in eastern Nevada in the Summer of 2006.
Great Basin National Park in Nevada
Hi again Tyson,
This is a Giant Silkmoth Caterpillar in the genus Hyalophora. The likeliest candidate in our opinion is Glover’s Silkmoth, Hyalophora columbia gloveri. We are unable to link to BugGuide this morning, but we did locate an image on the Butterflies and Moths of Arizona website.