This was just fascinating! I was taking up the paving slabs in the back garden (to make a bigger border - part of a grand-ish plan for improving the back garden. It's all likely to take some years to complete though). Anyway, I lifted the first slab and I uncovered an ants' nest. Of course, they immediately went into defence mode and began hiding away all the eggs. Managed to get a photo of the little heros in action. All the eggs were gone in under 5 mins though. Pretty darned efficient.
