Leopard geckos feed on insects, such as crickets, earthworms, roaches and meal worms. They prefer to eat live insects, and most refuse to eat dead prey. If keeping leopard geckos in captivity, it is important to feed them a variety of types of insects because their food preferences often change over time.
Leopard geckos are able to store excess fat in their tails. When food is scarce, as it often is in their natural desert habitat, they rely on these fat stores for energy. As soon as food becomes available again, they eat heartily to rebuild their fat stores. A thick, fleshy tail is a sign of a healthy leopard gecko. If a gecko's tail becomes thin, it is a sign that it's not receiving adequate nutrition.
Leopard geckos are a large gecko species that can reach up to 11 inches in length when mature. Their backs are covered in small bumps and their undersides are smooth. Leopard geckos have an assortment of skin patterns and colors ranging from green to brown. Like all reptiles, they are ectothermic, which means that they are unable to regulate their own body temperature. During the day, they absorb heat from the sun, and during the night when the temperature is cool, they hunt and digest food.