Figure 3.

Times of visits to each nest by switching ants. Times normalized with 0 as start of emigration; 100 as end of pre-decision period. Squares, ants from colonies that chose the far nest, colonies pooled. Analysis of ranked data showed a positive correlation (Spearman ρ=0.473, n=77, p<0.001). Individual trials all showed positive correlations. Circles, ants from colonies that chose the near nest, colonies pooled. Analysis of ranked data showed a significant negative correlation (Spearman ρ=−0.529, n=27, p<0.01). Individual trials all showed negative correlations. The two colonies that split are not plotted. Pooled, they showed no significant correlation; individually one was slightly positively correlated; one slightly negatively correlated.