Bubble of what?

We headed to the car boot this morning but as soon as we got out of the car, it started to rain.  We had toyed with the idea of having our own stall to get rid of all the tat treasure - so glad we decided against it.

It's amazing the detail you see when you zoom in through your phone.  The bee, in my extra, had a little bubble under its wing.  I thought it must have been a stubborn raindrop but when I zoomed in, something inside the bubble was moving!  Anyone know if that's how they carry their eggs, or could it have been some sort of parasite?

Quote for today:
Your thoughts are bubbles waiting to be popped.
- Jon Kabat-Zinn