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Rattlesnake Exploration Database

The Rattlesnake Conservancy Species Database is a tool that can be used by the public, researchers, government, private herpetoculturists, and the like to find information on the status of rattlesnakes in their state or country. This database is searchable by any field below. We are constantly updating this database, so if you see an error or missing data, please send us a message or email us at info@savethebuzztails.org

We are also developing an interactive map that shows the range of all known rattlesnake species in the New World (the Americas). 

Least concern - current information indicates this species is not in need of immediate conservation action to prevent extinction

Declining - current information indicates that this species is markedly declining due to various factors, such as rattlesnake roundups, climate change, indiscriminate killing, habitat destruction, fragmentation, lack of habitat management, and/or other natural and manmade features.

Crotalid of Special Concern - Species of rattlesnake that have been identified by TRC as needing proactive conservation measures to prevent becoming imperiled.

Imperiled - Species of rattlesnake that have an immediate threat of extinction or have a small endemic range without a resilient population.

Common name
Scientific name
Country(ies)
States of Occurrence
Tlaloc's Rattlesnake
Crotalus tlaloci
Mexico
Guerrero, Estado de México, Michoacán, Morelos, and possibly into Puebla
Baja California Rattlesnake
Crotalus enyo enyo
Mexico
Baja California, Baja California Sur
Santa Catalina Island Rattlesnake
Crotalus catalinensis
Mexico
Baja California Sur
Mexican Black-tailed Rattlesnake
Crotalus molossus nigrescens
Mexico
Sinaloa, Sonora, Chihuahua, Durango, Coahuila, Oaxaca, Veracruz, Tlaxcala, Zacatecas, Hidalgo, Aguascalientes, Quéretaro, Tamaulipas, San Luis Potosí, Morelos, Jalisco, Guanajuato, Nuevo León, Puebla, Nayarit
Tiger Rattlesnake
Crotalus tigris
United States of America, Mexico
Arizona (USA), Sonora (MX), possibly in extreme southwestern New Mexico (USA) and extreme northwestern Chihuahua (MX)
Western Pygmy Rattlesnake
Sistrurus miliarius streckeri
United States of America
Texas, Louisiana, Arkansas, Oklahoma, Missouri, Mississippi, Alabama, Tennessee
Carolina Pygmy Rattlesnake
Sistrurus miliarius miliarus
United States of America
North Carolina, South Carolina, Georgia, Northwestern Alabama
Totonacan/Totonacas Rattlesnake
Crotalus totonacus
Mexico
San Luis Potosí, Nuevo León, Tamaulipas, Querétaro, Hidalgo, and Veracruz.
Uracoan/Cascabel de Uracoa Rattlesnake
Crotalus vegrandis
Venezuela
Monagas and Anzoátegui.
Autlán/Manantlán Long-tailed Rattlesnake
Crotalus lannomi
Mexico
Jalisco & Colima
Timber/Canebrake Rattlesnake
Crotalus horridus
United States of America, Canada
Florida, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, New Jersey, Pennsylvania, New York, New Hampshire, Connecticut, Vermont, Alabama, Mississippi, Tennessee, Kentucky,Ohio, Indiana, Illinois, Minnesota, Wisconsin, Iowa, Louisiana, Texas, Oklahoma, Arkansas, Kansas, Missouri, Ontario (extirpated), Maine (extirpated), Rhode Island (extirpated)
Prairie/Western/Great Plains Rattlesnake
Crotalus viridis viridis
United States, Canada, Mexico
Alberta (CN), Saskatchewan (CN), Montana (US), Idaho (US), North Dakota (US), South Dakota (US), Wyoming (US), Colorado (US), Nebraska (US), Colorado (US), Kansas (US), New Mexico (US), Oklahoma (US), Texas (US), eastern Iowa (US), Chihuahua (MX), Coahuila (MX) Possibly into extreme southeast Arizona (US) and northeast Sonora (MX)
Eastern Massasauga Rattlesnake
Sistrurus catenatus
United States of America and Canada
New York, Illinois, Iowa, Missouri, Wisconsin, Indiana, Michigan, Ohio, Pennsylvania, Minnesota, Ontario
Dusky Pygmy Rattlesnake
Sistrurus miliarius barbouri
United States of America
Florida, Georgia, Alabama, southeastern Mississippi, extreme southeastern South Carolina
Arizona Ridge-nosed Rattlesnake
Crotalus willardi willardi
United States of America
Arizona
Hopi Rattlesnake
Crotalus viridis nuntius
USA
Utah, Arizona, New Mexico
Yucatan Neotropical/Yucatan/Tzabcan Rattlesnake
Crotalus tzabcan
Mexico, Belize, Guatemala
Quintana Roo (MX), Campeche (MX), Yucatán (MX), El Petén (GT), Belize (BZ), Cayo (BZ), Corozal (BZ), Orange Walk (BZ), Stann Creek (BZ), Toledo (BZ)
Central Plateau Dusky Rattlesnake
Crotalus triseriatus
Mexico
Michoacan, Morelos, Mexico, Puebla, Veracruz
Cross-banded Mountain Rattlesnake
Crotalus transversus
Mexico
México and Morelos
Tancítaran Cross-banded Mountain Rattlesnake
Crotalus tancitarensis
Mexico
Michoacán

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Jacksonville, FL |  info@savethebuzztails.org  |  1-800-690-5638

© The Rattlesnake Conservancy, 501(c)(3) corporation

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