Subject: Yellow & Black moth
Location: North Las Vegas, Nevada
July 8, 2016 5:19 am
It was quite large, and appeared yellow and black/brown, though the picture makes it look more brown and black.
Because it is at rest, the upper wings on your Whitelined Sphinx or Striped Morning Sphinx are covering the pink striped underwings that are revealed in flight. This is a common, wide ranging species that if found in all 48 continental United States and Canada, though it is most common in the west. Periodically there are population explosions of both the Whitelined Sphinx Caterpillars and consequently, after they mature, adult Whitelined Sphinxes. It is not unusual for us to find several Whitelined Sphinxes attracted to the porch light of our Mount Washington offices at certain times of the year.