Comment on Ihle, “Towards a quantitative kinetic theory of polar active matter” E. Bertin, H. Chaté, F. Ginelli, G. Grégoire, S. Léonard and A. Peshkov Eur. Phys. J. Special Topics, 223 7 (2014) 1419-1422 Published online: 12 June 2014 DOI: 10.1140/epjst/e2014-02202-3