The manufacture of shrunken heads was formerly the specialty of the Jivaro Clan of the Amazon River basin located in central South America. The clan was divided into four subgroups: Achuar, Shuar, Aguaruna, and the Huambisa. The Shuar were the group that did the most head shrinking of their time. Among the Shuar, a shrunken head is known as a tsantsa, also transliterated tzantza.
After World War II, the shrunken heads of two prisoners were found at the Buchenwald concentration camp. One of them was presented as evidence at the Nuremberg Trials by U.S. Executive Trial Counsel Thomas J. Dodd.
The skull was removed from the head; the maker would make an incision on the back of the neck and proceeded to remove all the skin and flesh from the cranium. Afterwards, they placed red seeds underneath the eyelids and sewed them shut. The mouth was held together with three palm pins. Fat from the flesh of the head was removed. The flesh was then boiled in water in which a number of herbs containing tannins were steeped, then dried with hot rocks and sand, while being molded by the preparer to retain its human feature. The skin was then rubbed down with charcoal ash, with the belief that this would keep the musiak, or avenging soul, from seeing out. The lips were sewn shut, and various decorative beads were added to the head.
Shrunken heads are known for their mandibular prognathism, facial distortion and shrinkage of the lateral sides of the forehead; these are artifacts of the shrinking process.
The process to reduce the size of the heads was accompanied by a ritual, which culminated with la Fiesta de la Victoria (Spanish for "victory party") celebrated by the entire community.
The practice of preparing shrunken heads originally had religious significance; shrinking the head of an enemy was believed to harness the spirit of that enemy and compel him to serve the shrinker.
They believed in the existence of three fundamental spirits:
To block the last spirit from using its powers, they decided to sever their enemies' heads and shrink them. The process also served as a way of warning those enemies. Although mainly found in South America and the Africas evidence has also been found in Europe, and northern England. , the warrior who killed shrunk his victim's head in the hope that the warrior could possess the soul of the victim. The more trophies a warrior attained, the more arutam -- or personal power -- he possessed. The only way to attain this power was to shrink the head of the victim. If the head was not shrunken, the victim's avenging soul could return to harm the killer and retrieve his arutam.
Even with these uses, the owner of the trophy did not keep it for long. Many heads were later used in religious ceremonies and feasts that celebrated the victories of the tribe. The heads would either be discarded or given to the children.
Thor Heyerdahl recounts in Kon-Tiki (1947) the various problems of getting into the Jívaro (Shuar) area in Ecuador to get balsa wood for his expedition boat. Local people would not guide his team into the forest for fear of becoming themselves shrunken heads.
Currently, replica shrunken heads are manufactured as curios for the tourist trade. These are made from leather and animal hides formed to resemble the originals. Replica shrunken heads, due to their provocative nature, are also popular in the hotrod culture, where they are often seen hanging from rearview mirrors as ornaments.