White bottomed bees

[Levitt53]

We've noticed today that we have about 6-10 of the white bottomed bees flying around mainly the back of my hives. There is loads of vegetation around so I suspect there maybe a nest somewhere. Should I be worried? I have 3 hives - one is massive, the other was queenless but is now covering 9 frames and the other is a swarm I collected which is building up nicely.

 

[Swarm]

No need for worry.

 

[Levitt53]

Great. I didn't think so. It just seemed an increase from the odd one we'd seen previously.