ants and earthworm...

The ground by the walk way was completely covered with their tiny moving bodies. An area maybe the size of my hand was just a pulsating mass of ants. I wonder what they were doing there. I thought that maybe the colony was on the move. Or maybe they were working as a cooling mechanism for their sun exposed location?
A few yeards further, on the same path, a little earth worm, ready to give up. I have not touched one of those since I was probably 8. It barely moved. It was so overheated, on this hopeless concrete walkway. Once I placed it in the shade of the much cooler grass, it began to be more active again...
I am obviously not in the city today. (and this computer does not have a spellchecker, so please be kind...