Watching You Watching Me.
I believe this is a Sulfur Butterfly of some kind. Not sure.
This is a Male Orange sulphur or Alfalfa butterfly (Colias eurytheme).
Love the polka-dotted eyes. Monarch eyes are polka-dotted, too.
It is sitting on a faded gallardia blossom.
I also captured a bit more traditional shot of the same species of buttefly sitting on a bit less faded gallardia blossom.
Identification and additional information from Philip Koenig, Missouri regional coordinator for Butterflies and Moths of North America. See www.butterfliesandmoths.org/ for more information. (Phil: Thank you!)