What is the primary function of the *Crotalus molossus* rattle?

To serve as an auditory signal designed to deter large mammals from accidental encounters

The rattle mechanism produced by the snake is a specialized adaptation focused entirely on preemptive defense, not offense or hunting. When the snake feels threatened, it will typically activate the rattle to create a distinct buzzing sound. This sound functions as an auditory warning signal, alerting larger animals, such as humans or grazing mammals, to the snake's presence. The intent is to encourage the perceived threat to change its course and avoid an accidental confrontation or stepped-upon situation. It is not used proactively to corner or initiate an attack on prey animals, nor is it considered an offensive weapon in the context of a strike.