خون‌سرد

Also known as cold-blooded animal, cold blooded animal, coldblooded animal, cold-blooded organism, cold blooded organism, coldblooded organism, cold-blood, cold blood

thumb|Pseudemys [[turtles (shown here basking for warmth) are ectothermic.]] thumb|The red line represents the air temperature. The purple line represents the body temperature of the lizard. The green line represents the base temperature of the burrow. 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.