Ant Fight! ( Sugar ant v. Black ants )

Camponotus consobrinus (sugar) and Ochetellus glaber (black)

I was taking the 2 boys for a walk down to the river on the weekend when we came across a lone sugar ant in the middle of a swarm of about 20 tiny black ants on a patch of exposed sandstone. At first it looked like the small black ants were teaming up to attack the sugar ant, but after watching them for a while it was clear the sugar ant was not trying to get away, and was in fact chasing and attacking the much smaller black ants!