The Hermann's tortoise (Testudo hermanni hermanni) is an ectotherm reptile. Its body temperature is neither constant nor produced by its own organism but variable and modeled on the temperature of the external environment. It, therefore, regulates its temperature (thermoregulation) by warming itself in the sun rays until it reaches the 77 to 86°F (25 to 30°C) necessary for the good progress of its vital feeding and reproduction activities.