Fig. 6. Thorax temperatures (T_th) of different honeybees during long visits to empty cells adjacent to sealed brood cells. Bees that are lying still inside cells may be engaged in heat production (A–C) or resting (D). Heating bees with net temperature changes (T_th)_net=+3.9°C (A) and –0.3°C (B). During a longer cell visit (C), repeated cooling and heating and short interruptions (arrows) occur. Symbols: , bee enters cell; , bee leaves cell. T_th of bee outside cell (open circles) and inside cell (filled circles) are plotted.

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