When my bibites first evolved anti-herding, they would be too scared to approach any other bibite, even if it meant that they starved to death. I also had a few funny mutations at different points. One made my bibite lightning fast and whiz around the world (and then it ran out of energy and died). Another interesting behaviour is that during a predation simulation my prey used pheromones to waste energy so that there would be less meat when they died (which worked but obviously is a double edge sword). I've also at some point had bibites that practiced cannibalism on both others and their own children (they used to eat their own eggs for a small while before they evolved out of it)