I am not sure if this is the right board for this, but here it goes.. Move if needed!
My Lasius niger keep covering the cotton wool where they can drink from with soil in the foraging tank. They have an impressive mound in just a day. The soil has now soaked up the water inside the bottle and is damp.
Would they be doing this to cool down I wonder? They bring brood down under this soil to support this theory. Their farm is damp and not dry however.. Any ideas?
Most of ours do this as well, covering honey water, cotton wool, sticky food etc. This not only gives better grip, but the brood is being moved to have variants of humidty. Our sabs are the worst, I clean their dish up every morning