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Fig. 2. Infrared thermal image of a rattlesnake (A) prior to feeding and (B) 48 h following feeding a meal comprising 32% Mb. The scale bar shows a total range of 2.5°C, where black is the coldest temperature and white is the warmest temperature. Note the uniform increase in body surface temperature in the snake following feeding. The darkest spot in each image is the nose, where evaporative cooling leads to a significant reduction in temperature.





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