Media type: E-Article Title: Hierarchical group dynamics in pigeon flocks Contributor: Nagy, Máté; Ákos, Zsuzsa; Biro, Dora; Vicsek, Tamás Published: Springer Science and Business Media LLC, 2010 Published in: Nature, 464 (2010) 7290, Seite 890-893 Language: English DOI: 10.1038/nature08891 ISSN: 0028-0836; 1476-4687 Origination: Footnote: