Fig. 3. Paths after reaching F1. Paths after the switch are shown from the point where ants have reached within 20 cm of F1 until the ants reach F2 or the end of the recording period. Trajectories are grouped according to the number of trials after the switch. (A) Experimental configuration as in Fig. 1B. Trajectories are from six ants and the proportion of trajectories that reached within 20 cm of F1 were 58% (runs 1–10), 17% (runs 11–20) and 3% (runs 20+). (B) Experimental configuration as in Fig. 1A. Trajectories are from 20 ants and the proportion of trajectories that reached within 20 cm of F1 were 81% (runs 1–10), 32% (runs 11–20) and 13% (runs 20+).