A photographer in Northwest Russia recorded an example of a Reindeer cyclone, when hundreds of reindeer start stampeding around in a massive circle.
It is believed to be a defensive manoeuvre. The reindeer young and mothers are in the center, while the bucks run in a circle around them.
The confusing stampede even makes it difficult for predators to pick out one of the bucks to attack.
READ: Drone captures stunning footage of a giant reindeer ‘cyclone’ in the Arctic Circle that makes it impossible for predators to target an individual in the herd