http://imgur.com/a/Zq4eX -- Yesterday morning after my daily walk, I saw a pill/sow bug eating its breakfast. I noticed there were Argentine ants' midden trash like body parts, etc.
http://imgur.com/a/0MNfn -- I also saw a small spider webbing an Argentine worker ant by going circle around her next to the midden trash. I scared the hungry pill bug, and it ran into the busy spider and scared it away! Haha. Oops. The ant managed to escape after a while. None of the near by worker ants helped.