Northern Copperhead
- Description of Agkistrodon contortrix mokeson, its habitat, habits, reproduction and care of the young.
- http://www.dnr.state.oh.us/Home/species_a_to_z/speciesguide_default/northerncopperhead/tabid/6699/Default.aspx

Eastern Massasauga Rattlesnake
- Description of Sistrurus catenatus catenatus, its habitat, habits and reproduction.
- http://www.dnr.state.oh.us/Home/species_a_to_z/speciesguide_default/easternmassasauga/tabid/6610/Default.aspx

Wisconsin Reptiles
- Wisconsin based reptile community with information on local reptiles.
- http://www.wireptiles.com

Timber Rattlesnake
- Crotalus horridus information.
- http://www.umass.edu/nrec/snake_pit/pages/timber.html

Copperhead
- Agkistrodon contortrix information.
- http://www.umass.edu/nrec/snake_pit/pages/copper.html

Rattlesnakes of Arizona
- An analysis of the domain of rattlesnakes of Arizona as expressed by an expert. This model linguistics project is an ethnographic interview, not a zoological monograph.
- http://www.jqjacobs.net/southwest/rattlesnake.html

Desert Scour: The Sand Viper Page
- Information about several desert viper species.
- http://www.plumed-serpent.com/dscour.html

Viperidae
- Site about vipers of the family Viperidae, concerning the genera Vipera, Macrovipera, Daboia, Cerastes, Pseudocerastes and Eristicophis.
- http://www.kingsnake.com/viperidae/

American International Rattlesnake Museum
- Includes pictures and descriptions of sixteen snakes ranging from the Arizona Black Rattlesnake (Crotalus viridis cerberus) to the Western Diamondback Rattlesnake (Crotalus atrox). Also provides facts regarding how dangerous rattlesnakes are, what t
- http://www.rattlesnakes.com/