What are coup sticks made out of?

Coup sticks, traditionally used by Native American warriors, are usually made from wood, often carved from materials like willow or other lightweight but durable types of wood. Some coup sticks are adorned with feathers, fur, or beads, which symbolize the achievements of the warrior who used them. The stick itself is often decorated with markings that represent the number of coups or acts of bravery performed by the warrior.