title: Group behaviour: leadership by those in need.
abstract: A new model of animal group behaviour shows that, when the need to reach a target outweighs the costs of splitting from the group, a minority of the most 'needy' individuals become the leaders of large groups.
authors.affiliation: Mathematics Department, Uppsala University, Uppsala, Sweden. david@math.uu.se
authors.forename: David J T
authors.initials: DJ
authors.lastname: Sumpter
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D007857:Leadership; D012641:Selection, Genetic; D012919:Social Behavior