Fig. 1. (A) Inbound (return) and (B) outbound (foraging) paths of individual ants shuttling back and forth on the terrace platform between the feeding site (F9.5; open circle with cross) and the nest (N; filled circle). Only the eastern half of the terrace is shown. The northeast corner of the terrace is taken as the origin of the x,y coordinate system. The positions of the ants were recorded every 10s. N=15 (A) and N=11 (B).