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.
The southern alligator lizard is a common species of lizard in the family Anguidae. The species is native to the Pacific coast of North America. It ranges from Baja California to the state of Washington and lives in a variety of habitats including grasslands, chaparral, forests, and even urban areas. In dry climates, it is likely to be found in moist areas or near streams. There are five recognized subspecies.
The prairie skink is a species of skink endemic to the prairies east of the Rocky Mountains in North America. It is one of only seven species of lizards that occur in Canada.
Plestiodon multivirgatus, commonly known as the many-lined skink, the northern many-lined skink, or the variable skink, is a medium-sized species of lizard, a member of the North American skink genus Plestiodon in the family Scincidae.
Erhard's wall lizard, also commonly called the Aegean wall lizard, is a species of lizard in the family Lacertidae. The species is endemic to Southeast Europe.
Pituophis catenifer is a species of nonvenomous colubrid snake endemic to North America. Nine subspecies are currently recognized, including the nominotypical subspecies, Pituophis catenifer catenifer, described here. This snake is often mistaken for the prairie rattlesnake, but can be easily distinguished from a rattlesnake by the lack of black and white banding on its tail and by the shape of its head, which is narrower than a rattlesnake's.
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 Great Basin collared lizard, also known commonly as the desert collared lizard or the Mojave black-collared lizard, is a species of lizard in the family Crotaphytidae. The species is endemic to the Western United States.
The long-nosed snake is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America. It has two recognized subspecies. The other species in the genus were previously considered subspecies.
Salvadora is a genus of colubrid snakes commonly called patchnose snakes or patch-nosed snakes, which are endemic to the western United States and Mexico. They are characterized by having a distinctive scale on the tip of the snout.
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.
Holbrookia maculata, commonly known as the lesser earless lizard, is a species of lizard in the family Phrynosomatidae. The species is native to the southwestern and central United States and northern Mexico. There are eight recognized subspecies.
Coluber constrictor etheridgei, commonly known as the tan racer, is a subspecies of nonvenomous snake in the family Colubridae, a subspecies of the eastern racer. The subspecies is native to the southern United States.
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.
Pristurus carteri, commonly known as Carter's rock gecko or Carter's semaphore gecko, is a species of gecko, a lizard in the family Sphaerodactylidae. The species is endemic to the Sinai Peninsula.
Bogert's coral snake is a species of venomous snake in the family Elapidae. The species is endemic to southern Mexico.
Isla Santa Inés is an island in the Gulf of California east of the Baja California Peninsula. The island is uninhabited and is part of the Mulegé Municipality in the Mexican state of Baja California Sur.
Isla San Luis is an island in the Gulf of California east of the Baja California Peninsula. The island is uninhabited and is part of the San Felipe Municipality.
Bogert's monitor is a species of tree-dwelling lizard in the family Varanidae. The species is native to Papua New Guinea.
Typhlacontias punctatissimus, also known commonly as the dotted blind dart skink, the speckled burrowing skink, and the speckled western burrowing skink, is a species of lizard in the family Scincidae. The species is native to southern Africa. Three subspecies are recognized.
