I've seen a lot of great postings of tribal bows so I have to contribute this which I ran across doing research on tribes local to the area where I grew up.
This bow and quiver of arrows was picked up after the Battle of Big Hole in the Nez Perce War and has an amazing tragic story attached to it.
http://www.nps.gov/history/museum/exhibits/nepe/exb/contact_change/1877War/BIHO623_Bow.htmlMuseum listing:
Bow
Palouse
This bow belonged to Five Fogs or Dark Cloudy Days Five Times Repeated. He was the son of the Palouse headman Hahtalekin. A participant in the Nez Perce war, he was killed at the Battle of Big Hole on August 9, 1877. Yellow Wolf reports that Five Fogs, “did not understand the gun. He was good with the bow, but had only a hunting bow . . . . He was just in front of his own tepee ... He stood there shooting arrows at the enemies. The soldiers saw, and fired at him ... Three times those soldiers fired and missed him. The fourth round killed him”. (page 119 Yellow Wolf)
Wood, sinew. L 113.4, W 3 cm
Nez Perce National Historical Park, BIHO 623