Why do tortoises need a heat lamp?

Tortoises are ectothermic animals, meaning they rely on external heat sources to regulate their body temperature. A heat lamp provides the necessary warmth for their metabolic processes, aiding in digestion, activity levels, and overall health. Without a heat lamp, tortoises can become lethargic, lose appetite, and face serious health issues. It's essential for their habitat to mimic their natural environment, which includes basking areas with adequate warmth.