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(a) The relative frequency, p, that partners occupy given (x, y) coordinates for leaders (left) and followers (centre). In these plots the focal individual is located at the origin, and is travelling parallel to the positive x-axis (from left to right). The colour scale on these plots is such that bluer regions correspond to lower densities, and redder regions correspond to greater densities. Details of (b–d) are the same as in figure 1.
