Fig. 4
Differences in unpredictability between species result from species-specific patterns of speed and direction of motion. Continuous probability distributions of a speed and b–d angle of locomotion for field animals. In all subplots, the quadrupedal jird, Meriones sp., is shown in blue, the bipedal jerboa, Dipus sagitta, is shown in green, and the bipedal jerboa, Allactaga elater, is shown in orange. In a, the integral of each probability distribution is equal to one. In b–d, the color opacity at a given angle on the sphere corresponds to the probability of moving at that angle, with respect to the animal location in the previous frame (the center of the sphere). b Shows the probability distribution of the quadrupedal jird, Meriones sp., movement angle in blue, c shows the probability distribution of the bipedal jerboa, Dipus sagitta, movement angle in green, d shows the probability distribution of the bipedal jerboa, Allactaga elater, movement angle in orange. Spheres are symmetric about the equator due to the symmetry of the ascent and descent about the apex of a leap. Asymmetry about the y axis in Allactga elater is likely the result of asymmetry in the predation stimulus
