I don't know much about leaf cutter ants. I've only seen them on two occasions. Once on a night walk in Costa Rica and once in the Ecuadorian Amazon when I was staying at the Napo Cultural Center.
Doing a quick search on the internet, I've read that the name "leaf cutter ant" is generic and there are 47 species of ants that can be considered leaf cutters.
I also read that they can destroy crops - and I believe it after what I saw.
But with all that - they are fascinating creatures!
At the Napo Cultural Center lodge, there were a lot of walkways and natural areas all around the lodge area.
Walking from the main dining area to my tent, I couldn't help but notice the ants carrying the leafs across one of the pathways.
As I looked, the path was really far starting further than I could see, over the grass, down and over the walkway over the grass, across another walkway until their hole in the ground. Even the grass path was trampled down by these tiny little ants.