Fig. 1. Experimental set-up. The nest was enclosed from all sides, with two outbound channels of 6 m and 12 m leading to feeders sunk into the ground and one inbound channel connected to the enclosure. Plastic gates between the channels and the nest enclosure allowed control over entry and exit of ants. Ants that arrived at the feeder were picked up and released in the 32 m long test channel that was placed parallel to the outbound channels. Figure is not drawn to scale.