I seem to remember an article a few years ago regarding AI being driven by procedural behaviors. I'll see if I can look for it.
From what I can recall, they were using it in such a way to control herds of animals with typical and very realistic behaviors, even down to when the camera came within a certain distance, the animals would "shy away" from it and effectively creating a bubble within the herd around the camera. If the camera kept coming too closely, the herd would try to move away and continue "migrating." They could also add predatory animals into the mix, and cause the herd to stampede.
I hope I can find it ... it was quite old (almost eight years ago, I think), and only used particles for the herds, but it was quite an interesting thing to watch it, especially if you like nature shows.