How do desert birds, reptiles, and rodents get moisture from food?

Desert animals have evolved specialized physiological and behavioral adaptations to thrive in environments where water is scarce. They obtain necessary moisture through several primary methods:

• Dietary Intake: Many desert animals, particularly carnivores, derive the water they need directly from the prey they consume. Similarly, insectivorous lizards obtain significant amounts of water from their insect prey. Some herbivores, such as the dorcas gazelle, rely on the moisture found in the leaves of desert plants like Acacia bushes.123
• Metabolic Efficiency: Reptiles are particularly efficient because they excrete uric acid, which requires very little liquid to eliminate nitrogenous wastes. Furthermore, their low metabolic rates allow them to use less water than birds or mammals.2
• Behavioral Adaptations: Many desert animals, including rodents, are subterranean, remaining in cool, humid burrows during the day to minimize water loss through evaporation. Some lizards can even harvest dew that collects on their skin in the early morning.42

While some animals can survive on moisture from food, others, such as seed-eating birds, may still need to travel long distances to locate surface water.1