Cover: A harbor seal (Phoca vitulina) at the Marine Science Center Rostock. Harbor seals, semiaquatic mammals, are able to perform banked turns. However, during free swimming, they segregate their head and body movements into short rotations, saccades and long translations. This saccadic movement strategy as revealed by Geurten et al. (pp. 1503-1508) has now been documented for terrestrial and aquatic species. Thus it might be a universal strategy to optimize the gain from optic flow. Photo credit: Wolfgang Pölzer.