Fig. 2. Mean differences between air temperature (T_a) and body temperature (T_b) of six Gila monsters at five experimental temperatures. Increasing T_a led to increasing suppression of T_b (P<0.0001), and T_b was consistently lower than T_a at higher temperatures. Asterisks represent significant differences (P<0.01) between the control and diaper trial values. Vertical and horizontal error bars represent ± 1 S.E.M. for temperature suppression and chamber temperature, respectively.