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Thermoregulation
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===Ectothermic heating (or minimizing heat loss)=== [[File:Lizard Thermoregulation.svg|thumb|The red line represents the air temperature.<br /> The purple line represents the body temperature of the lizard.<br /> The green line represents the base temperature of the burrow.<br /> Lizards are ectotherms and use behavioral adaptations to control their temperature. They regulate their behavior based on the temperature outside, if it is warm they will go outside up to a point and return to their burrow as necessary.]] * Convection: ** Climbing to higher ground up trees, ridges, rocks. ** Entering a warm water or air current. ** Building an insulated nest or burrow. * Conduction: ** Lying on a hot surface. * Radiation: ** Lying in the sun (heating this way is affected by the body's angle in relation to the sun). ** Folding skin to reduce exposure. ** Concealing wing surfaces. ** Exposing wing surfaces. * Insulation: ** Changing shape to alter surface/volume ratio. ** Inflating the body. [[File:wiki stranglesnake.jpg|thumb|[[Thermographic]] image of a snake around an arm]] To cope with low temperatures, some [[fish]] have developed the ability to remain functional even when the water temperature is below freezing; some use natural [[antifreeze]] or [[antifreeze proteins]] to resist ice crystal formation in their tissues.<ref name=":1">{{Cite journal|last1=Crevel|first1=R.W.R|last2=Fedyk|first2=J.K|last3=Spurgeon|first3=M.J|date=July 2002|title=Antifreeze proteins: characteristics, occurrence and human exposure|url=https://linkinghub.elsevier.com/retrieve/pii/S027869150200042X|journal=Food and Chemical Toxicology|language=en|volume=40|issue=7|pages=899β903|doi=10.1016/S0278-6915(02)00042-X|pmid=12065210}}</ref> [[Amphibian]]s and [[reptile]]s cope with heat gain by evaporative cooling and behavioral adaptations. An example of behavioral adaptation is that of a lizard lying in the sun on a hot rock in order to heat through radiation and conduction.{{cn|date=March 2025}}
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