Sky burial or ritual dissection was once a common funerary practice in Tibet wherein a human corpse is cut into small pieces and placed on a mountaintop, exposing it to the elements or the mahabhuta and animals – especially to birds of prey. In Tibetan the practice is known as jhator which literally means, "giving alms to the birds."
The majority of Tibetans adhere to Buddhism, which teaches reincarnation. There is no need to preserve the body, as it is now an empty vessel. Birds may eat it, or nature may let it decompose. So the function of the sky burial is simply the disposal of the remains. In much of Tibet the ground is too hard and rocky to dig a grave, and with fuel and timber scarce, a sky burial is often more practical than cremation.
Additionally, since no fuel, land, or topsoil is consumed, this way of burial is arguably more ecologically friendly than cremation or interment.
The government of the People's Republic of China, which has controlled Tibet since 1950, prohibited the practice (which it considered barbaric) in the 1960s but started to allow it again in the 1980s. Non-Tibetans are usually not permitted to observe it, and direct photography is considered unethical, offensive and is generally forbidden.
A jhator was filmed, with permission from the family, for the documentary Secret Towers of the Himalayas which aired on the Science Channel in Fall 2008. The camera work was deliberately careful to never show the body itself, while documenting the procedure, birds, and tools.
The procedure takes place on a large flat rock long used for the purpose. The charnel ground (durtro) is always higher than its surroundings. It may be very simple, consisting only of the flat rock, or it may be more elaborate, incorporating temples and stupa (chorten in Tibetan).
Relatives may remain nearby during the jhator, possibly in a place where they cannot see it directly. The jhator usually takes place at dawn.
The full jhator procedure (as described below) is elaborate and expensive. Those who cannot afford it simply place their deceased on a high rock where the body decomposes or is eaten by birds and animals.
Accounts from observers vary. The following description is assembled from multiple accounts by observers from the U.S. and Europe. References appear at the end.
The work of disassembling of the body may be done by a monk, or, more commonly, by rogyapas ("body-breakers").
All the eyewitness accounts remarked on the fact that the rogyapas did not perform their task with gravity or ceremony, but rather talked and laughed as during any other type of physical labor. According to Buddhist teaching, this makes it easier for the soul of the deceased to move on from the uncertain plane between life and death onto the next life.
In one account, the leading rogyapa cut off the limbs and hacked the body to pieces, handing each part to his assistants, who used rocks to pound the flesh and bones together to a pulp, which they mixed with tsampa (barley flour with tea and yak butter or milk) before the vultures were summoned to eat.
In several accounts, the flesh was stripped from the bones and given to vultures without further preparation; the bones then were broken up with sledgehammers, and usually mixed with tsampa before being given to the vultures. Many rogyapa first feed the bones and cartilage to the vultures, keeping the best flesh until last. After having had their fill of good quality meat, the birds usually fly away - leaving the bones and less favored bits.
In another account, vultures were given the whole body. When only the bones remained, they were broken up with mallets, ground with tsampa, and given to crows and hawks that had waited until the vultures had departed.
Sometimes the internal organs were removed and processed separately, but they too were consumed by birds. The hair is removed from the head and may be simply thrown away; at Drigung it seems at least some hair is kept in a room of the monastery.
None of the eyewitness accounts specifies what kind of knife is used in the jhator. One source states that it is a "ritual flaying knife" or trigu (Sanskrit kartika), but another source expresses skepticism, noting that the trigu is considered a woman's tool (rogyapas seem to be exclusively male).
In places where there are several jhator offerings each day, the birds sometimes had to be coaxed to eat, which in one case was accomplished by a ritual dance. It is considered a bad omen if the vultures will not eat, or if even a small portion of the body is left after the birds fly away.
In places where fewer bodies are processed, the vultures were more eager and sometimes had to be fended off with sticks during the initial preparations.