Leaf cutters

So today we went to a 'theme park' (I use the term loosely, it's quite rubbish) and there's this place there called Amazonia. Basically they charge you a fortune to go look at some Koi Karp, butterflies and birds, with a spider and snake thrown in here and there. The best thing about the place were the leaf cutter ants. They have this big rope coming from the ants' nest (is it called a nest? Colony maybe?), across the path and into a big feeding dish thing filled with leaves. So you walk under the rope and get to see the ants doing the rounds collecting food for the colony. It's fascinating. I could actually have watched them all day.