Abstract
Body temperature and associated postures of the zebra-tailed lizard, Callisaurus draconoides, were examined in the field and laboratory. Three distinct postures are described: prostrate, tail-down and elevated. The mean body temperatures of the respective postures in the field were: 33.9, 40.5 and 42.7 C. In the laboratory, heating rates were greatest for the prostrate posture and least for the elevated posture. Body temperatures and heating rates are significantly correlated with posture. These correlations suggest that the postures are associated with behavioral thermoregulation in the field.
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