It bears repeating that reptiles potentially dangerous to man account for only a small proportion of Nevada’s herpetofauna. Of the twenty-five snake species found here, only the six rattlesnakes pose any possible threat. Similarly, of twenty lizard species native to Nevada, only the Gila monster is venomous. The vast majority of reptiles found in Nevada (and elsewhere) are completely harmless!
At temperatures below 16 degrees Celsius or below 60 degrees Fahrenheit rattle snakes will become sluggish because they are cold blooded. They typically function most effective around 70/90 degrees Fahrenheit or 21/32 degrees Celsius. Rattlesnakes are more active during the spring and fall or evening and night. Mid day they typically go underground to avoid the hot temperatures
