The term "Sidewinder" primarily refers to a type of snake known for its unique method of movement. Found in arid regions of the southwestern United States and Mexico, the Sidewinder can move sideways across sandy terrain, allowing it to navigate quickly while minimizing contact with the hot ground. This adaptation helps it avoid overheating and predators. Additionally, "Sidewinder" is also the name of a popular air-to-air missile, the AIM-9 Sidewinder. Developed by the United States in the 1950s, this missile is designed for use by fighter aircraft to engage enemy aircraft. Its infrared homing capability allows it to track and target heat emitted by enemy jets effectively.