Forest Warrior (1996) on Netflix

Plot summary

At a campfire, Clovis Madison tells the children a story of the frontiersman McKenna, slain in the Tanglewood forest a hundred years ago by armed men after he turned down a lumber company's offer for his land. The forest gave him new life and the power to take the shape of a bear, a wolf or an eagle. The children who camp in a treehouse name themselves the Lords of the Tanglewood. In the present day, a logging conglomerate headed by Travis Thorne has marked Tanglewood for harvesting, and much of the small town is against it. McKenna, a master of Native American martial arts, and the children set out to stop the crews.