If you can identify the exact species of Sphingidae, please post a comment or email me!
White-lined Sphinx Moth (Hyles lineata in the Sphingidae family) hovering over water to drink.
For more information about White-lined Sphinx Moths, read en.wikipedia.org/wiki/Hyles_lineata and en.wikipedia.org/wiki/Sphingidae
This one was spotted in Darwin Falls Canyon (Death Valley National Park).