3.

Equations of linear regressions for the temperature excess (T_body−T_a) of honeybees foraging on flowers in dependence on ambient temperature (T_a), for three classes of solar radiation.

Body part	Radiation (W m−2)	Equations	R2	P	N
Thorax	<200	Tth = 33.67525 − 0.99959 ×Ta	0.68966	<0.0001	38
	200–500	Tth = 30.22421 − 0.78827 ×Ta	0.62899	<0.0001	34
	>500	Tth = 28.90354 − 0.69027 ×Ta	0.64243	<0.0001	40
Head	<200	Thd = 18.32716 − 0.52247 ×Ta	0.64175	<0.0001	38
	200–500	Thd = 16.13789 − 0.35410 ×Ta	0.44063	<0.0001	34
	>500	Thd = 17.69125 − 0.33341 ×Ta	0.40007	<0.0001	40
Abdomen	<200	Tab = 5.71561 − 0.12621 ×Ta	0.13078	0.02569	38
	200–500	Tab = 4.54687 − 0.00239 ×Ta	0.00003	0.97678	34
	>500	Tab = 7.57345 − 0.02636 ×Ta	0.00232	0.76767	40

R² = squared correlation coefficient, P = probability, N = number of means per flower and day.