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Fig. 5. Experimental results. Distribution frequency of the size of the groups of
successive ants travelling in the same direction identified at the level of
the line between the bottleneck and the entrance on the nest side of the
bridge for each bridge width. The distribution frequency of group size
obtained with a random sequence of ants generated on the basis of an equal
probability of occurrence of nestbound and outbound ants is also represented.
N=1203 and N=905 for the 10 mm and 3 mm bridge,
respectively.