The desert night lizard, Xantusia vigilis, is a night lizard native to southern California east of the Sierras and San Gabriel Mountains into Baja California, southern Nevada, southwestern Utah and extreme western Arizona. Like all night lizards, the desert night lizard is viviparous, giving birth to live young and producing 1 to 3 young from August to December. The desert night lizard attains a snout-to-vent length (SVL) of 1.5 to 2.75 in (3.8 to 7.0 cm) with a tail roughly the same length.