Part of the Flying Humanoid Phenomena Explained?

Outside on a pretty winter day in Phoenix (60s and sunny), I noticed something dark in the sky moving around. I took my cell phone and took a photo and then another and several more, hoping to capture it on the bright screen (couldn't see it on the screen so far away).

I pulled up one pic and cropped it so I could see the dark item of focus. It was a bird circling. Then, researcher Dennis Guern looked through the pics and we found what might be part of the explanation for flying humanoids - 

Given the way the bird was gliding away and up and down, it was captured in one moment in time, seeming to defy gravity.