Many human groupings , such as an army detachments or sports teams , show such co-ordination and differentiation of roles , but so do some animal groupings such as those of eusocial insects , which are co-ordinated through pheromones and other forms of animal communication . Many human groupings , such as army detachments or sports teams , show such co-ordination and differentiation of roles , but so do some animal groupings such as those of eusocial insects , which are co-ordinated through pheromones and other forms of animal communication .