Animals — 36,937 Species
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Mexican Lancehead Rattlesnake
Crotalus polystictus (Cope, 1865)
Crotalus polystictus is a venomous rattlesnake found on the central Mexican plateau at mid-to-high elevations.
Western Diamond-backed Rattlesnake
Crotalus atrox Baird & Girard, 1853
Crotalus atrox, the western diamondback rattlesnake, is a large North American venomous pit viper with a characteristic diamond-patterned body.
Western Rattlesnake
Crotalus oreganus Holbrook, 1840
Crotalus oreganus is a North American rattlesnake with variable size, coloration, and well-documented life history traits.
Eastern Diamondback Rattlesnake
Crotalus adamanteus Palisot De Beauvois, 1799
This is the eastern diamondback rattlesnake, the largest rattlesnake species native to the southeastern United States.
Queretaran Dusky Rattlesnake
Crotalus aquilus Klauber, 1952
Crotalus aquilus is a small, heavy-bodied rattlesnake found in highland habitats of central Mexico.
Basilisk Rattlesnake
Crotalus basiliscus (Cope, 1864)
Crotalus basiliscus is a large rattlesnake species native to the western Mexican coastal plain.
Mexican Pygmy Rattlesnake
Crotalus ravus Cope, 1865
Crotalus ravus is a moderately stout rattlesnake found only in temperate high elevations across central and southern Mexico.
Prairie Rattlesnake
Crotalus viridis Rafinesque, 1818
Crotalus viridis (prairie rattlesnake) is a North American rattlesnake with specific traits and viviparous reproduction.
Central American Rattlesnake
Crotalus simus Latreille, 1801
Crotalus simus is a rattlesnake species found from Mexico to Colombia with documented traditional medicinal use by Maya people.
Eastern Black-tailed Rattlesnake
Crotalus ornatus Hallowell, 1854
Crotalus ornatus is a medium-sized black-tailed rattlesnake native to the southwestern US and Mexico.
Campbell's Rattlesnake
Crotalus campbelli Bryson Jr, Linkem, Dorcas, Lathrop, Jones, Alvarado-Díaz, Grünwald & Murphy, 2014
Crotalus campbelli is a 2014-described Mexican rattlesnake found in rocky montane areas of western Mexico.
Western Black-tailed Rattlesnake
Crotalus molossus Baird & Girard, 1853
Crotalus molossus, the black-tailed rattlesnake, is a medium-sized venomous rattlesnake found in the southwestern US and Mexico.
Mexican Dusky Rattlesnake
Crotalus armstrongi Campbell, 1979
Crotalus armstrongi, the western dusky rattlesnake, is a small venomous pit viper endemic to Mexico with no recognized subspecies.
Southwestern Speckled Rattlesnake
Crotalus pyrrhus (Cope, 1866)
Crotalus pyrrhus is a variable-colored rattlesnake found in rocky habitats of the southwestern US and northwestern Mexico.
Tamaulipan Rock Rattlesnake
Crotalus morulus Klauber, 1952
Crotalus morulus is an ovoviviparous rattlesnake species with fluorescent rattles and distinct dark blotched patterning.
Speckled Rattlesnake
Crotalus mitchellii (Cope, 1861)
Crotalus mitchellii, the speckled rattlesnake, is a small North American desert rattlesnake with variable camouflaged patterning.
Tehuantepec Isthmus Neotropical Rattlesnake
Crotalus ehecatl Carbajal-Márquez, Cedeño-Vázquez, Martínez-Arce, Neri-Castro & Machkour-M'Rabet, 2020
Crotalus ehecatl is a large sexually dimorphic rattlesnake endemic to specific regions of Mexico.
Brazilian Lancehead
Bothrops moojeni Hoge, 1966
Bothrops moojeni is a defensive viviparous viper found across central South America in forest and savanna habitats.
Terciopelo
Bothrops asper (Garman, 1883)
Bothrops asper is a highly sexually dimorphic pit viper widespread across lowland to mid-elevation regions from eastern Mexico to northern South America.
Spotted Lancehead
Bothrops punctatus (Garcia, 1896)
Bothrops punctatus is a semiarboreal lance-headed pit viper found from Panama to northern Peru in moist and wet forests.
Common Lancehead
Bothrops atrox (Linnaeus, 1758)
Bothrops atrox, the common South American terrestrial pit viper, is a common non-endangered species that bears live young.
Jararacussu
Bothrops jararacussu Lacerda, 1884
Bothrops jararacussu, the jararacussu, is a large venomous pit viper found in forests across eastern South America.
Whitetail Lancehead
Bothrops leucurus Wagler, 1824
Bothrops leucurus is a terrestrial viviparous pit viper found along the Atlantic coast of eastern Brazil.
Marbled lancehead
Bothrops marmoratus Da Silva & Rodrigues, 2008
Bothrops marmoratus, the marbled lancehead, is a nocturnal viviparous viper species found only in Goiás, Brazil.
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