Why the reptiles and birds need a lot of water to conserve?

Reptiles and birds require significant amounts of water to maintain hydration and regulate their body temperature. While reptiles often rely on external sources of heat for thermoregulation, birds require water for physiological processes such as digestion and thermoregulation through evaporative cooling. Additionally, water is crucial for maintaining the health of their skin and feathers, which is vital for insulation and protection. Access to adequate water sources is essential for their survival and reproductive success.