Occurred on April 29, 2021 / Billings, Montana, USA
Info from Licensor: "Snake ball, filmed in Billings, MT April 29, 2021. A snake ball is literally a ball of mating snakes (usually garter snakes, like in this video). The ball is made up of nearly all male snakes writhing around a single female in an attempt to mate! This ritual happens once per year in the spring and only one male gets the chance to breed."