Fig. 9. Mean times in the local active searching phase, t_s, comprising short flight-segments having length L<10 m, and in the relocation phase, t_r, comprising long flight-segments having length L>10 m (X). Mean times do not change significantly when the length scale L is increased or decreased by a factor of 2. Mean times for a diverse range of intermittent foragers (•) [copepod nauplius, phorid fly, cricket, octopus, Arctic grayling fish (foraging for large and small prey) and freely flying Drosophila fruit flies] (Kramer and McLaughlin, 2001; Bénichou et al., 2005; Reynolds and Frye, 2007). The scaling relation t_rt_s, predicted by the Levy-flight model of optimal searching (Reynolds, 2006), is shown (solid line).