The Crotaphytidae, or collared lizards, are a family of desert-dwelling reptiles native to the Southwestern United States and northern Mexico. Alternatively they are recognized as a subfamily, Crotaphytinae, within the clade Pleurodonta. They are very fast-moving animals, with long limbs and tails; some species are capable of achieving bipedal running at top speed. This species is carnivorous, feeding mainly on insects and smaller lizards. The two genera contain 12 species.
The Phrynosomatidae are a diverse family of lizards, sometimes classified as a subfamily (Phrynosomatinae), found from Panama to the extreme south of Canada. Many members of the group are adapted to life in hot, sandy deserts, although the spiny lizards prefer rocky deserts or even relatively moist forest edges, and the short-horned lizard lives in prairie or sagebrush environments. The group includes both egg-laying and viviparous species, with the latter being more common in species living at high elevations.
Fringe-toed lizards are lizards of the genus Uma in the family Phrynosomatidae, native to deserts of North America. They are adapted for life in sandy deserts with fringe-like scales on their hind toes hence their common name.
The western fence lizard is a species of lizard native to Arizona, New Mexico, and California, as well as Idaho, Nevada, Oregon, Utah, Washington, and Northern Mexico. The species is widely found in its native range and is considered common, often being seen in yards, or as the name implies, on fences. As the ventral abdomen of an adult is characteristically blue, it is also known as the blue-belly. Two western fence lizards have been reported with duplicated or forked tails, presumably following an autotomy.
The Coachella Valley fringe-toed lizard is a species of phrynosomatid lizard.
The western whiptail is a species of lizard in the family Teiidae. The species is found throughout most of the southwestern United States and northern Mexico. Most of its populations appear stable, and it is not listed as endangered in any of the states comprising its range. It lives in a wide variety of habitats, including deserts and semiarid shrubland, usually in areas with sparse vegetation; it also may be found in woodland, open dry forest, and riparian growth. It lives in burrows. Major differences between this species and the checkered whiptail include the lack of enlarged scales anterior to the gular fold and the presence of enlarged postantebrachial scales. It was previously known as Cnemidophorus tigris, until phylogenetic analyses concluded that the genus Cnemidophorus was polyphyletic. Since it does not migrate, a number of forms have developed in different regions, several of which have been given subspecific names – for example the California whiptail, Aspidoscelis tigris munda.
The coast horned lizard is a species of phrynosomatid lizard endemic to Baja California Sur in Mexico. As a defense the lizard can shoot high pressure streams of blood out of its eyes if threatened.
Sceloporus magister, also known as the desert spiny lizard, is a lizard species of the family Phrynosomatidae, native to the Chihuahuan Desert and Sonoran Desert of North America.
The flat-tail horned lizard is a species of lizard in the family Phrynosomatidae. A species of reptile, it is endemic to the Sonoran desert of the southwestern United States and northwestern Mexico. Its multiple adaptations for camouflage help to minimize its shadow. The species is threatened, with a restricted range under pressure from human activities such as agriculture and development, and is specially protected in the United States.
The western long-tailed brush lizard is a species of lizard in the family Phrynosomatidae. The species is native to the southwestern United States and adjacent northern Mexico.
The western banded gecko is a species of lizard in the family Eublepharidae. The species is native to the southwestern United States and adjacent northwestern Mexico. Five subspecies are recognized.
The peninsula leaf-toed gecko is a medium-sized gecko. It is found in southern California (USA) and Baja California (Mexico), including many islands in Gulf of California as well as Islas Magdalena and Santa Margarita off the west coast of Baja California.
The Mojave fringe-toed lizard is a species of medium-sized, white or grayish, black-spotted diurnal lizard in the family Phrynosomatidae. It is adapted to arid climates and is most commonly found in sand dunes within the Mojave Desert. Fringe-toed lizards are characterized by their fringed scales on their hind toes which make locomotion in loose sand possible.
Coachella Valley National Wildlife Refuge is a 3,709-acre (15.01 km2) protected area in Riverside County, California's Coachella Valley. It lies within the unincorporated community of Thousand Palms, just north of Palm Desert. The refuge contains the majority of critical habitat for the Coachella Valley Fringe-toed Lizard within the Coachella Valley Preserve and Indio Hills Palms State Reserve.
The Mohawk Dunes fringe-toed lizard is a species of phrynosomatid lizard endemic to the U.S. state of Arizona. Its name is a reference to American actress Uma Thurman, as both a pun on the genus name Uma as well as a tribute to the actress for her conservation advocacy.
The Yuman Desert fringe-toed lizard is a species of phrynosomatid lizard endemic to northwestern Mexico, although a hybrid population of it and Uma notata ranges north to southwestern Arizona in the United States.
The Chihuahuan fringe-toed lizard is a species of lizard in the family Phrynosomatidae. It is endemic to Mexico.
The fringe-toed sand lizard is a species of lizard in the family Phrynosomatidae. It is endemic to Mexico. It is omnivorous, with the ability to detect food chemically by tongue-flicking.
