The wolf is the predator that can chase the reindeer for a very long time. The wolf tries to catch the reindeer and bite it in the back or get a hold of the back leg. When it gets hold of the reindeer, the reindeer turns around and then the wolf bites it in the throat and kills the reindeer.
During the month of May the reindeers usually migrate up to the mountains but sometimes the male reindeers get behind and feed from the agricultural fields which they are not supposed to. So this time the Sami Village needed to use helicopter to move the reindeers closer to the mountains.