Drymarchon is a genus of large nonvenomous colubrid snakes, commonly known as indigo snakes or cribos, found in the Southeastern United States, Central America, and South America. Reaching 3 m (9.8 ft) or more in length, they are among the world's largest colubrid snakes.
The black swamp snake is a species of snake in the subfamily Natricinae of the family Colubridae. The species is endemic to the southeastern United States. There are three subspecies, including the nominotypical subspecies.
Tantilla is a large genus of harmless New World snakes in the family Colubridae. The genus includes 66 species, which are commonly known as centipede snakes, blackhead snakes, and flathead snakes.
Crotalus basiliscus, known as the Mexican west coast rattlesnake, Mexican green rattler, and also by other names, is a species of pit viper in the family Viperidae. The species is endemic to western Mexico. Like all other pit vipers, it is venomous. The specific name, basiliscus, is derived from the Greek word for king, βασιλισκος, and alludes to this snake's large size and potent venom. No subspecies are currently recognized.
Crotalus ruber is a venomous pit viper species found in southwestern California in the United States and Baja California in Mexico. Three subspecies are currently recognized, including the nominate subspecies described here.
Crotalus mitchellii is a venomous pit viper species in the family Viperidae. The species is endemic to the Southwestern United States and adjacent northern Mexico. The species was named in honor of Silas Weir Mitchell (1829–1914), an American medical doctor who also studied rattlesnake venoms. Five subspecies are currently recognized, including the nominate subspecies described here.
Coniophanes is a genus of colubrid snakes, commonly referred to as black-striped snakes, but they also have many other common names. The genus consists of 17 species, and despite the common name, not all of them display striping.
Nerodia clarkii, commonly known as the salt marsh snake, is a species of semiaquatic, nonvenomous, colubrid snake found in the southeastern United States, in the brackish salt marshes along the Gulf of Mexico from Florida to Texas, with a population in northern Cuba.
The Mexican lance-headed rattlesnake or lance-headed rattlesnake is a venomous pit viper species found in central Mexico. No subspecies is currently recognized.
Crotalus triseriatus is a venomous pit viper species found in Mexico. Two subspecies are currently recognized, including the nominate subspecies described here.
Salvadora hexalepis, the western patch-nosed snake, is a species of non-venomous colubrid snake, which is endemic to the southwestern United States and northern Mexico.
The narrow-headed garter snake, Thamnophis rufipunctatus, is a species of garter snake, endemic to the southwestern United States and adjacent northwestern Mexico. Its common names also include narrowhead garter snake and narrowhead watersnake.
Geophis sanniolus, commonly known as the pygmy snail-eating snake or the pygmy snail sucker, is a species of small snake in the family Colubridae. The species is endemic to Central America and southeastern Mexico.
The Middle American indigo snake, also known commonly as the blacktail cribo, is a species of large, nonvenomous, snake in the family Colubridae. The species is native to the southwestern United States, Mexico, Central America, and northern South America. In addition to the nominotypical subspecies, it has four other recognized subspecies, including D. m. erebennus commonly known as the Texas indigo snake.
Micrurus diastema, commonly known as the variable coral snake, is a species of venomous snake in the family Elapidae. The species is endemic to southeastern Mexico and northern Central America. There are seven recognized subspecies.
Apostolepis is a genus of snakes in the subfamily Dipsadinae. However, the familial placement differs among sources. It has also been placed in the family Colubridae, subfamily Dipsadinae or Xenodontinae, or in the family Xenodontidae. The genus Apostolepis is endemic to South America.
The West Coast garter snake is a species of snake in the family Colubridae. The species is endemic to Mexico. Four subspecies are recognized.
The yellow-red rat snake is a species of snake in the family Colubridae. The species is endemic to Mexico and Central America. Three subspecies are recognized.
Pituophis deppei, commonly known as the Mexican bullsnake and the Mexican pine snake, is a species of nonvenomous colubrid snake endemic to Mexico. There are two recognized subspecies.
