Island of Santa Catalina off the west coast of California
Dry, desert habitat
Similar in all respects to other crotalids except it has no rattles. Apparently an inheritable defect in the matrix causes the species to retain only the keratin surrounding the matrix and nothing else. As new segments are grown, they are cast off when the snake sheds.
Rattlers can climb trees. It is not uncommon to find one 4–5 feet off the ground in mesquite, manzanita or other shrubs. They are also good swimmers. The fangs can be folded back inside a skin fold to protect them when their mouth is closed. The venom in most crotalus is hemotoxic. This is the only species of rattlesnake that is consistently without a rattle on its tail. Be Rattlesnake Aware! Download this .pdf: Rattlesnake Awareness Brochure.pdf