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Fig. 6. Distance of focus (DOF) of the same nine individual bats flying along the
hedge as in Fig. 5. Flight
direction from right to left. The first individual in the upper row was the
only one not using the corridor below the hedge. Hemispheres indicate the
surface of zero ranging error, i.e. a hemisphere with the DOF as its radius,
plotted around the position of the bat at the time of each call.