That's a classic "orb" picture Mr. D! I do see the faint one to it's left. Dust particles or moisture would show differently. According to the knowledge I have so far. The really interesting ones are the vortex type ones, your lucky to get one of them - they look like an orb til they (or it) starts to move and you get trails and swirly movement, got one of those? Hehe, now I'm pumped for the "mysterious" stuff. I'm still wrestling with the idea of my chickens having cropped beaks, oh well. Poor babies...