Buzzing in my compost!

I've just gone to add my latest grass clippings to my compost bin, and discovered it has a thick layer of white, 'fizzy' looking mould on it...and it's buzzing like a beehive! What do I do? I'm not a great gardener and this is way beyond me!

 

Could be a bumble bee's nest - it's the right time of year for it.

 

lots of people have suggested this, so that's probably the right answer. However, as i could do with turning the compost to get rid of the mould, how do I do this without disturbung thebees too much? And will the bees just go away on their own?

 

I've got white mould on mine too but no bee's. The compost has been getting quite warm recently, it steams when you turn it. Not sure if they are linked really.

 

If the compost heap is in a really bad place (for you) try to find a local beekeepers group, there's plenty if you do a search in Google for your area.