Huge circular UFO over Prince Edward Island

On August 20, 2017, a black circular-shaped UFO is appeared in the sky somewhere over the province of Prince Edward Island, Canada. The photographer didn't see it.

Witness report:

I did not notice the object until after I had taken the photo. While looking in the direction BEFORE snapping the photo I did not she anything in the sky. I'm not sure what this is, if it's anything at all, but if it is, I figure you guys are the folks to figure that out! Thank you for you'r time.