Figure 2.

Patrolling intensity by leaf age. The relationship of leaf length (cm) to the number of patrolling workers per centimetre length (patroller density). Patroller density is higher on smaller new leaves, and is restricted to solitary workers on mature leaves (fitted line not shown), regardless of mature leaf size (ANCOVA, F_1,82=17.3, R²=0.69, p<0.001). Restricting the analysis to leaf lengths ≥8.7 cm (the smallest mature leaf) still reveals a significantly higher patrolling density on new leaves (Paired t-test: n=23, t=3.6, p=0.002).