A shrunken head is a severed and specially prepared human head that is used for trophy, ritual, or trade purposes. Headhunting has occurred in many regions of the world, but the practice of headshrinking has only been documented in the northwestern region of the Amazon rainforest. Jivaroan peoples, which includes the Shuar, Achuar, Huambisa and Aguaruna tribes from Ecuador and Peru, are known to have shrunken human heads. Shuar people call a shrunken head a tsantsa, also transliterated tzantza. Many tribe leaders would show off their heads to scare enemies.