The panting responses observed in overheated birds and mammals dissipate excess heat by evaporation
Many mammals, most birds, and some reptiles use the cooling technique known as panting, which involves evaporating water from interior body surfaces. The animal's respiration rate increases significantly as its body temperature rises, and it cools as a result of water evaporating from its mouth, lungs, and (in birds) air sacs. Similar to other evaporative cooling methods (like perspiration), panting uses up a lot of water, which must be replenished for the animal to continue to regulate its body temperature.
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