A huge trail of ants (many hundreds) was on my kitchen counter last night so I sprayed them with vinnegar (I was out of windex so I used vinnegar instead). Being late, and wishing the vinnegar to discourage new foragers, I retired for the evening.
Much to my chagrin, another, even larger swarm of Argentine ants had taken over my counter top, this morning - and the dead ants seem to have disappeared. I was surprised.
So, I sprayed 'em again and left the area for a while. Sure enough, yet another swarm replaced the second, and I noticed some carrying away the dead bodies of their camerades.
My question..... Are ants cannibals or did the inadvertant pickling entice them to cannibalism?