Figure 1. Experimental design:

(a) A holding nest with one removable wall, the entrance width is 1 mm before wall removal and 60 mm after wall removal. (b) Experimental arena: the dark rectangles show the location of the two new nest sites (the Fluctuating Nest and the Constant Mediocre Nest) and the white rectangle represents the holding nest. The petri dish is 230 × 230 mm; the distance between the entrances of the two new nests is 90 mm; the distance between the entrance of the holding nest and the entrance of each new nest is 105 mm.