Big

Possibly two of the biggest ants I have ever seen. Each one at least 2 cms long and working in perfect unison carrying a trophy of some sort.  One was going forwards and the other going backwards. 

I didn't hang around long enough to work out where they were going, and actually, I have to say I didn't want to interfere.  They looked as though they could deliver a nasty bite.

Only a phone image unfortunately.