Check our California Snakes Range maps page to find out what snakes occur in your general area. Females often remain with their young in nests for several weeks, and mothers have been observed cooperatively parenting their broods. Epidemiology of severe and fatal rattlesnake bites. Large numbers of rattlesnakes are killed by humans. Sealing all cracks and other openings greater than 1/4inch can prevent them from entering. Rattlesnakes are the leading cause of snakebite injuries in North America and a significant cause in Central and South America. Do not try to cut the bite wound open or suck out the poison.  Rattlesnakes prefer a temperature range between 80 and 90 °F (26 and 32 °C), but can survive temperatures below freezing, recovering from brief exposure to temperatures as low as 4 °F (−16 °C), and surviving for several days in temperatures as low as 37 °F (3 °C).
Rocks offer them cover from predators, plentiful prey (e.g. https://www.wildlife.ca.gov/Keep-Me-Wild/Rattlesnakes. , The most probable ancestral area of rattlesnakes is the Sierra Madre Occidental region in Mexico. It contains components evolved to immobilize and disable the prey, as well as digestive enzymes which break down tissue to prepare for later ingestion. Summer heat means rattlesnakes.  The Arizona black rattlesnake (C. oreganus cerberus), has been observed to exhibit complex social behavior reminiscent of that in mammals. Dodgers, Lakers post-season success not paying off, Alaska earthquake measuring 7.5 triggers tsunami warning, Woman arrested in stabbing death of LA Metro employee, 2 rescued after crash sends car careening into NY canal, Newsom explains why you probably won't get a vaccine in 2020, Debate commission to mute candidates during opponent's response, Woman who was found alive at funeral home in August dies at hospital, Elections officials say drop boxes are safer than USPS mail boxes, What to do if your roommate gets COVID-19, OC store dedicated to Trump merchandise draws supporters, Riverside County sheriff's sergeant dies on duty, Extreme heat wave expected to strain CA power grid over Labor Day weekend. that live amidst the rocks), and open basking areas. The contraction of special "shaker" muscles in the tail causes these segments to vibrate against one another, making the rattling noise (which is amplified because the segments are hollow) in a behavior known as tail vibration. Venom is produced in glands behind the eyes and then flows through ducts to the hollow fangs.  Male rattlesnakes have sexual organs known as hemipenes, located in the base of the tail.
 The Ancient Maya considered the rattlesnake to be a "vision serpent" that acted as a conduit to the "otherworld".. Stay alert and keep pets near you at all times. The rattlesnakes and their venom yield and lethal toxicity.  The right atrium receives deoxygenated blood from veins coming from the systemic circuit. However, rattlesnakes rarely bite unless provoked or threatened; if treated promptly, the bites are seldom fatal. The southwestern speckled rattlesnake (C. mitchellii) ranges from Baja California northward across much of the Colorado, Mojave, and Sonoran Deserts, overlapping with the red diamond rattlesnake (C. ruber) in western parts of its range and the sidewinder farther east. , Rattlesnakes, like other members of the Squamata order, contain a circulatory system that is powered by a three-chambered heart composed of two atria and one ventricle.
, Rattlesnakes tend to avoid wide-open spaces where they cannot hide from predators, and generally avoid humans if they are aware of their approach. Philadelphia: American Association of Poison Control Centers' Annual Reports. If drinking dew, or drinking from small puddles, they sip the liquid either by capillary action or by flattening and flooding their lower jaws.  The female produces the ova ("eggs") in her ovaries, after which they pass through the body cavity and into one of her two oviducts. Rattlesnakes sense kingsnakes' presence by their odor. , Many rattlesnakes die from being run over by cars.. , The venom is hemotoxic, destroying tissue, causing necrosis and coagulopathy (disrupted blood clotting).
Nat.  They lie in wait for their prey, or hunt for it in holes. Treating and Preventing Venomous Bites", "Climate Changes Faster Than Species Can Adapt, Rattlesnake Study Finds", https://en.wikipedia.org/w/index.php?title=Rattlesnake&oldid=982904108, Wikipedia articles incorporating a citation from the New International Encyclopedia, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, Dalstrom, Harl A. , Rattlesnakes are believed to require at least their own body weight in water annually to remain hydrated. In the deserts of Riverside and Imperial county where the laborious date palms are grown, rattle snakes can cause a threat to harvesters if orchard vegetation is left uncontrolled. All Rights Reserved. Rattlesnakes are found in almost every type of habitat capable of supporting terrestrial ectothermic vertebrates, but individual species can have extremely specific habitat requirements, only able to live within certain plant associations in a narrow range of altitudes. The subfamily also includes many genera of pit vipers that are not rattlesnakes. , Rattlesnakes consume mice, rats, small birds , and other small animals. Rattlesnakes are a key element in Aztec mythology and were widely represented in Aztec art, including sculptures, jewelry, and architectural elements.
 The gastric fluids of rattlesnakes are extremely powerful, allowing for the digestion of flesh, as well as bone.  Children generally experience more severe symptoms because they receive a larger amount of venom per unit of body mass.
A majority of victims (about 72%) are males, often young and intoxicated.  The muscles that cause the rattle to shake are some of the fastest known, firing 50 times per second on average, sustained for up to three hours..
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