Leopard geckos are crepuscular, not nocturnal
Most active at dawn and dusk when temperatures in their native Pakistan and Afghanistan are ideal. During the day they shelter in rock crevices. In captivity, a gecko appearing inactive during daylight hours is completely normal — not a sign of illness.
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A widespread misconception is that the tail acts like a camel's hump storing water.
Autotomy — voluntary tail shedding — is a defence mechanism.
Unlike most gecko species which use van der Waals forces to climb smooth surfaces, leopard geckos have conventional claws.
The moveable eyelid is unusual among geckos.
Hold your gecko up to a light source and look through one ear opening — you can see light through the other side.
Leopard geckos exhibit Temperature-dependent Sex Determination.