Fig. 2. Dance indications of native and transplanted bees under overcast conditions on 28 July 2002. Each symbol represents the visual average of at least five wagging runs during a single bout of dancing; each bee was scored only once after a single trip to the feeder. The hive was at the south-facing treeline (Fig. 1B), where the direction to the feeder, and thus the correct dance indication, was 87.5° clockwise (CW) of N (Current site, horizontal black line in each panel). The predicted direction for dances oriented by memory of the sun's course at the north-facing treeline (Fig. 1A), to which the transplanted bees were native, was 253.5° (Natal site, horizontal gray line in each panel). (A) Bees native to the current site; (B) newly transplanted bees released on the day of the observations; (C) long-term transplantees, released at the current site 2-15 days earlier. Bimodal dances are indicated by broken vertical lines connecting the two dance directions. The sky bar above each panel indicates sky conditions: black indicates complete overcast; white indicates that the sun was visible; shading indicates the sun peeking frequently in and out. There were no periods of blue sky without sun. The sun first appeared at 8:22 h LST, indicated on each panel by the thin vertical line running the entire height of the graph. Statistical analyses here and below exclude dances occurring after the sun first appeared.