Study Debunks Baby Rattlesnake Danger Myth
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- Loma Linda University researchers debunked the long-standing myth that baby rattlesnakes are more dangerous than adults, finding adults carry and inject far more venom and cause substantially more severe bite symptoms.
- William K. Hayes, professor of biology at Loma Linda University School of Medicine, led the study published in the journal Toxins, noting that baby rattlers can control their venom expulsion just like adults.
- The myth's origins were traced to at least 1967 news reports, with California outlets amplifying the false claim throughout the 1970s–1990s before it spread more broadly across North America from 2000–2014.
- Misinformation stemmed largely from inaccurate quotes attributed to firefighters, police officers, and rescue personnel, while quotes from university subject matter experts were generally far more accurate.
- The misconception remains remarkably widespread: 53% of surveyed Southern California students and 73% of emergency responders and healthcare professionals still believed it was true.
- The false belief has led to misinformed risk-taking, unwarranted fear among snakebite victims, inappropriate medical care, and unnecessary killing of rattlesnakes whose populations have dropped significantly in parts of the United States.
- News coverage on the topic has grown increasingly accurate since 2015, the researchers found, crediting better public education.
Why it matters: With 73% of surveyed emergency responders and healthcare professionals still believing the myth, snakebite patients may receive inappropriate care — even though Hayes emphasized antivenom is the only effective treatment regardless of snake age. The misinformation also drives needless killing of rattlesnakes whose populations have dropped significantly across parts of the U.S., threatening the ecosystems they occupy.
