A moving stream of reindeers is coming forward in the snow as a simmering wave. ?When the herd has decided to leave his winter forests to join back the tablelands of the mountains, nothing can hold them back? says Lennart..Reindeer migration from Gallivare to the national parks of  Sarek and Stora Sj&ocirc;fallet, 200 km west. Lapland, Sapmi, north of Sweden..