This picture is interesting in that it's just a ball of light. Dust doesn't look like that and if it was a bug you can clearly tell it's a bug. I'm not a big believer in pictures being that most are easy to fake but I like this one. Good catch!
I disagree. To me, it's dust or moisture in the air. I've seen hundreds of pictures exactly like this that are explained the same way. Too similar to say it's paranormal in my opinion.