Apparently, Flygon in Grand Canyon are sort of Crepuscular. They often take advantages of the twilight time, when not all pokemons can adapt to the harsh contrast of light and dark. That's when you will see most of the Flygons flying around in Grand Canyon.
This is definitely one of my favorite shots of this trip for many reasons, hope you will enjoy it too!!
Photo taken by me in Grand Canyon
Please credit me if you post it somewhere else, Thank you.
Other wild pokemon from this series
you can find the other wild pokemon here [link]