Agkistrodon piscivorus: The Cottonmouth
- Michael Connor provides information on this snake, its adaptions, habitat, nutrition, interactions, life history, reproduction, classification and phylogeny.
- http://acadweb.uwlax.edu/07Spring/SAH/BIO203/connor_mich/

Venomous Snakes
- Find general information about several species including copperhead, coral, cobra, cottonmouth, rattle, and sea snakes. Includes photographs.
- http://www.venomoussnakes.net

Natural Toxins Research Center - Snake Database
- Natural history, images, and range maps for venomous snakes in the U.S. Includes facts on the venom of each snake.
- http://ntrc.tamuk.edu/cgi-bin/serpentarium/snake.query

Venomdoc
- Information and research by Bryan Grieg Fry on venomous snakes and other animals and their toxins.
- http://www.kingsnake.com/toxinology/

Timber Rattlesnake
- Crotalus horridus life history, status, bite information and Wisconsin Protection Saga information.
- http://www.mpm.edu/collect/vertzo/herp/timber/factshe1.html

Florida Venomous Snakes
- A fieldguide to the venomous snakes of Florida.
- http://www.flmnh.ufl.edu/natsci/herpetology/fl-guide/venomsnk.htm

Florida's Venomous Snakes
- Photographs and a brief description of six species.
- http://floridaconservation.org/viewing/species/snakesv.html

Bayou Bob's Brazos River Rattlesnake Ranch
- Includes brief information about various dangerous snakes.
- http://www.wf.net/~snake/

Venomous Snakes of Texas
- An on-line reference to all of the venomous snakes found in the state of Texas. In addition, several other non-venomous but interesting Texas snakes are discussed.
- http://www.kingsnake.com/venom/