Fig. 1. Mean cutaneous, ventilatory and cloacal water loss rates in six Gila monsters at various experimental temperatures. Note that ventilatory EWL shows little temperature sensitivity, while cutaneous EWL increases gradually as air temperature (T_a) increases, and cloacal EWL shows a dramatic increase at T_a greater than 35°C. Vertical and horizontal error bars represent ± 1 standard error for water loss rates and chamber temperature, respectively.