Snakes employ a variety of strategies to protect themselves from predators. One of the most common defense mechanisms is camouflage, where the snake's coloration and pattern help it blend in with its surroundings and remain undetected. Some snakes also have the ability to change their color to better match the environment.
Another common defense mechanism is mimicry, where a non-venomous snake will mimic the appearance and behavior of a venomous snake to deter predators. Venomous snakes use their venom as a defense mechanism, and will often deliver a warning bite or display their fangs to deter potential predators.
Some species of snakes, such as the rattlesnake, have evolved rattles at the end of their tails that they use to produce a distinctive warning sound when threatened. This warning helps to deter predators and can also alert humans to the presence of the snake.
Finally, some species of snakes will adopt a defensive posture when threatened, such as raising their head and flattening their body to make themselves appear larger and more intimidating. They may also hiss, lunge, or strike if they feel threatened or cornered.