The Common snapping turtle (Chelydra serpentina) is a species of large freshwater turtle. It is noted for its combative disposition when out of the water with its powerful beak-like jaws, and highly mobile head and neck (hence the specific epithet...
The Gila monster (Heloderma suspectum) is a heavy slow-moving venomous lizard. It is the largest extant lizard native to North America north of the Mexican border. The name "Gila" refers to the Gila River Basin in the U.S. states of New Mexico and...
The Painted turtle (Chrysemys picta) is the most widespread native turtle of North America. Fossils show that the painted turtle existed 15 million years ago. In the traditional tales of Algonquian tribes, the colorful turtle played the part of a...
The Smooth green snake (Opheodrys vernalis) is a North American nonvenomous snake in the family Colubridae. It is small to medium in size and gets its common name from its smooth dorsal scales. A non-aggressive snake, it seldom bites and usually...
The Mojave rattlesnake (Crotalus scutulatus) is a highly venomous pit viper species found in North America. It is perhaps best known for its potent neurotoxic-hemotoxic venom, which is considered one of the world's most potent rattlesnake venoms.
Western rattlesnake, commonly known as the (northern) Pacific rattlesnake, is a venomous pit viper species found in western North America from the Baja California Peninsula to the southern interior of British Columbia.
The spiny softshell turtle (Apalone spinifera ) is a species of softshell turtle, one of the largest freshwater turtle species in North America. Both the common name, spiny softshell, and the specific name, spinifera (spine-bearing), refer to the...
The Speckled kingsnake (Lampropeltis holbrooki) is a nonvenomous snake which is native to the United States. Its common name is derived from its pattern and this snake is also known as the "salt-and-pepper snake".
The Great Basin Gophersnake (Pituophis catenifer deserticola) is a subspecies of nonvenomous Gopher snake. It is found in parts of western United States and adjacent southwestern Canada and is often mistaken for the Prairie rattlesnake.
The Arizona black rattlesnake (Crotalus cerberus) is a venomous pit viper species found in the southwestern United States. Like all other vipers, this species is distinguished by the presence of a heat-sensing pit organ located between the eye and...
The Western yellow-bellied racer (Coluber constrictor mormon) is a subspecies of the Eastern racer. It is nonvenomous and is not dangerous to humans.
The Southwestern blackhead snake (Tantilla hobartsmithi) is a harmless small colubrid snake found only in the United States and Mexico. The part of its scientific name 'hobartsmithi', is in honor of American zoologist and herpetologist Hobart M....
The smooth softshell turtle (Apalone mutica ) is a species of softshell turtle of the family Trionychidae. The species is endemic to North America.
The desert box turtle, also known as the Sonoran box turtle, (Terrapene ornata luteola ) is a subspecies of box turtle which is endemic to the southwestern United States and northern Mexico. They are generally terrestrial but occasionally take to...
Crotalus viridis nuntius is a venomous pit viper subspecies native primarily to the desert plateau of the northeastern portion of the American state of Arizona, but also ranges into northwestern New Mexico. Named for the Native American Hopi tribe,...
Sistrurus catenatus edwardsii is a subspecies of venomous pit viper in the family Viperidae. The subspecies is endemic to the Southwestern United States and northern Mexico. In places, its range overlaps that of S. c. tergeminus, and intergrading of...
The Texas spiny softshell turtle (Apalone spinifera emoryi ) is a subspecies of the spiny softshell turtle in the family Trionychidae. The subspecies is native to the south-western United States. The subspecific name, emoryi, is in honor of United...
Crotalus lepidus klauberi is a venomous pitviper subspecies endemic to the southwestern United States and adjacent northern Mexico.
Rhinocheilus lecontei tessellatus is a subspecies of nonvenomous colubrid snake, which is endemic to the western United States and northern Mexico.
Crotalus willardi obscurus is a venomous pitviper subspecies found in northwestern Mexico and the Southwestern United States.
The Trans-Pecos striped whiptail (Aspidoscelis inornatus heptagrammus ) is a subspecies of the little striped whiptail (Aspidoscelis inornatus ) lizard. It is found in the semiarid, sandy habitats of the Chihuahuan Desert, in the United States from...
Arizona elegans philipi, commonly known as the Painted Desert glossy snake, is a subspecies of glossy snakes, a nonvenomous colubrid endemic to North America.
The marbled whiptail (Aspidoscelis marmoratus ) is a species of lizard found in the United States, in southern New Mexico and Texas, and in northern Mexico, in Coahuila, Chihuahua and Durango.
