- AbsoluteAstronomy.com: Sistrurus
- Features genus common names, appearance, range, venom, and list of species.
- Animal Bytes: Dusky Pygmy Rattlesnake
- Reviews taxonomy, description, status, range, habitat, ecology, diet, life cycle, and fun facts.
- Critter Corner: Massasauga Rattlesnake
- Gives status, nickname, Wisconsin locations, appearance, behavior, breeding, diet, and avoiding bites.
- Eastern Massasauga Rattlesnake (Sistrurus catenatus catenatus)
- Includes history, status in Michigan, range, habitat, behavior, appearance, similar snakes, and reporting observations.
- Eastern Massasauga Rattlesnake (Sistrurus catenatus catenatus)
- Provides appearance, habitat, reproduction, diet, range, threats, conservation work, and reasons for protection.
- Jacksonville Zoo and Gardens: Dusky Pygmy Rattlesnake
- Looks at range, habitat, appearance, lifespan, diet, behaviors, adaptations, and folklore.
- Massasauga Rattlesnake - Sistrurus catenatus
- Explains status, description, subspecies, range, habitat, breeding, behavior, and feeding habits.
- Massasauga Rattlesnake (Sistrurus catenatus)
- Discusses distribution, environment, appearance, diet, behavior, reproduction, lifespan, and predation.
- Pygmy Rattlesnake (Sistrurus miliarius)
- Offers images, description, range and habitat, behavior, diet, and conservation status.
- Pygmy Rattlesnake (Sistrurus miliarius)
- Gives images, appearance, range, habitat, reproduction, feeding habits, subspecies, status, and economic importance.
- Saint Louis Zoo: Massasauga Rattlesnake
- Contains range, habitat, scientific name, status, sensors, subspecies, feeding habits, breeding, and migration.
- Sistrurus miliarius barbouri (Dusky Pygmy Rattlesnake)
- Combines pictures and drawings with details on appearance, range, habitat, behavior, and similar species.
- Western Pygmy Rattlesnake (Sistrurus miliarius streckeri)
- Details history in Harris County, Texas. Includes identification tips, common name, similar species, habitat, and threats.
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