If I didn't know better, I might think there was a snake in the garden but one big difference between snakes and lizards are that lizards have ears whereas snakes 'hear' vibrations through their jaws. Lizards also have eyelids whereas snakes do not.
This is an African striped skink and they are very common in my garden. If you feed them, they can become tame and rather fat. Unfortunately, my cats love hunting them and have reduced their numbers considerably and the skinks here are wary and wild. This little one let me take photographs though.
This species of skink doesn't lay eggs but are able to give birth to live young.