If the woman is to be believed, she didn't even notice the flying saucer.
I'm saying that initially at least, this woman seems to have zero reason to have created fake pics. And no one is saying that the Camera photoshopped the pics itself, so I trust the lady that there was something there, even if it was only a bird or a bug.
Sure, it is possible. But a frisbee, or kite, or balloon would not have to "accidentally" look weird for one frame, they would look that way to everyone in every picture. That is why I think it is more logically an object, rather then a bird.