Dag the Wise

Dag the Wise or Dagr spaki was a mythological Swedish king of the House of Ynglings. He was the son of Dyggvi, the former king. According to legend, he could understand the speech of birds and had a sparrow that gathered news for him from many lands. When the bird was killed on one of these trips, Dag invaded Reidgotaland, in order to avenge it. There he was ambushed by a thrall and killed.