Reptiles are ectothermic: they rely heavily on environmental conditions and behaviour to regulate body temperature. That does not mean they are always cold, inactive, or unable to produce any metabolic heat. It means that sunlight, shade, warm surfaces, airflow, water, and shelter can strongly affect how they function.
Behaviour is part of physiology
A reptile may bask, move into shade, seek a burrow, change posture, or enter water to manage its temperature. These choices influence movement, digestion, immune function, reproduction, and activity. The best body temperature range is different for each species and situation.
“Cold-blooded” is an incomplete label
The traditional phrase can imply that reptiles have no control over their temperature. In reality, their behaviour and habitat selection are active forms of regulation. Some species also show limited physiological heat production or heat retention.
Care must be species-specific
Captive reptiles need a safe, measured thermal gradient appropriate to their species, not a generic heat-lamp setting. Consult reputable species care information and a reptile-experienced veterinarian rather than applying a temperature from a different animal.
