1. 
   Thermoregulate
   moving from a warm area to a cooler one or vice versa in order to regulate body temperature.
   Found op http://www.kingsnake.com/articles/Glossary.html
   
   
2. 
   thermoregulate
   To regulate body temperature. Most reptiles cannot produce their own body heat and must rely on external or environmental heat sources. They control their core body temperatures by moving in and out of areas with varying temperatures and humidity levels
   Found op http://animal-world.com/encyclo/reptiles/information/reptile_glossary.php
   
   

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