Fig. 2. Homebound paths of individual ants from their point of release, R, plotted for the first 30 s of each search run (N=27 in A, N=22 in B, N=21 in C). N_G depicts the relative nest position according to ground distance in the 3D test (A) and ground distance control (B). N_W is the relative nest position in walking distance controls (C). Square brackets in B and C indicate the predicted nest position of the other control group, respectively, and are shown for comparison.