Kinship in Dayak society is traced in both lines of genealogy (tusut). Although, in Dayak Iban society, men and women possess equal rights in status and property ownership, political office has strictly been the occupation of the traditional Iban patriarch. There is a council of elders in each longhouse.
Overall, Dayak leadership in any given region, is marked by titles, a Penghulu for instance would have invested authority on behalf of a network of Tuai Rumah's and so on to a Pemancha, Pengarah to Temenggung in the ascending order while Panglima or Orang Kaya (Rekaya) are tittles given by Malays to some Dayaks.
Individual Dayak groups have their social and hierarchy systems defined internally, and these differ widely from Ibans to Ngajus and Benuaqs to Kayans.
In Sarawak, Temenggong Koh Anak Jubang was the first paramount chief of Dayaks in Sarawak and followed by Tun Temenggong Jugah Anak Bariengwho was one of the main signatories for the formation of Federation of Malaysia between Malaya, Singapore, Sabah and Sarawak with Singapore expelled later on. He was said to be the "bridge between Malaya and East Malaysia".The latter was fondly called "Apai" by others, which means father. Unfortunately, he had no western or formal education at all.
The most salient feature of Dayak social organisation is the practice of Longhouse domicile. This is a structure supported by hardwood posts that can be hundreds of metres long, usually located along a terraced river bank. At one side is a long communal platform, from which the individual households can be reached.
The Iban of the Kapuas and Sarawak have organized their Longhouse settlements in response to their migratory patterns. Iban longhouses vary in size, from those slightly over 100 metres in length to large settlements over 500 metres in length. Longhouses have a door and apartment for every family living in the longhouse. For example, a longhouse of 200 doors is equivalent to a settlement of 200 families.
The tuai rumah (long house chief) can be aided by a tuai burong (bird leader), tuai umai (farming leader) and a manang (shaman). Nowadays, each long house will have a Security and Development Committee and ad hoc committee will be formed as and when necessary for example during festivals such as Gawai Dayak.
The Dayaks are peace loving people who live based on customary rules or adat asal which govern each of their main activities. The adat is administered by the tuai rumah aided by the Council of Elders in the longhouse so that any dispute can be settled amicably among the dwellers themselves via berandau (discussion). If no settlement can be reached at the longhouse chief level, then the dispute will escalate to a pengulu level and so on.
Among the main sections of customary adat of the Iban Dayaks are as follows:
- Adat berumah (House building rule)
- Adat melah pinang, butang ngau sarak (Marriage, adultery and divorce rule)
- Adat beranak (Child bearing and raising rule)
- Adat bumai and beguna tanah (Agricultural and land use rule)
- Adat ngayau (Headhunting rule)
- Adat ngasu, berikan, ngembuah and napang (Hunting, fishing, fruit and honey collection rule)
- Adat tebalu, ngetas ulit ngau beserarak bungai(Widow/widower, mourning and soul separation rule)
- Adat begawai (festival rule)
- Adat idup di rumah panjai (Order of life in the longhouse rule)
- Adat betenun, main lama, kajat ngau taboh (Weaving, past times, dance and music rule)
- Adat beburong, bemimpi ngau becenaga ati babi (Bird and animal omen, dream and pig liver rule)
- Adat belelang (Journey rule)
The Dayak life centres around the paddy planting activity every year. The Iban Dayak has their own year long calendar with 12 consecutive months which are one month later than the Roman calender. The months are named in accordance to the paddy farming activities and the activities in between. Other than paddy, also planted in the farm are vegetables like ensabi, pumpkin, round brinjal, cucumber, corn, lingkau and other food sources lik tapioca, sugarcane, sweet potatoes and finally after the paddy has been harvested, cotton is planted which takes about two months to complete its cycle. The cotton is used for weaving before commercial cotton is traded. Fresh lands cleared by each Dayak family will belong to that family and the longhouse community can also use the land with permission from the owning family. Usually, in one riverine system, a special track of land is reserved for the use by the community itself to get natural supplies of wood, rattan and other wild plants which are necessary for building houses, boats, coffins and other living purposes, and also to leave living space for wild animals which is a source of meat. Beside farming, Dayaks plant fruit trees like rambutan, langsat, durian, isu and mangosteen near their longhouse or on their land plots to amrk their ownership of the land. They also grow plants which produce dyes for colouring their cotton treads if not taken from the wild forest. Major fishing using the tuba root is normally done by the whole longhouse as the river may take sometime to recover. Any wild meat obtained will distribute according to a certain customary law.
Headhunting was an important part of Dayak culture, in particular to the Iban and Kenyah. The origin of headhunting in Iban Dayaks can be traced to the story of a chief name Serapoh who was asked by a spirit to obtain a fresh head to open a mourning jar but unfortunately he killed a Kantu boy which he got by exchanging with a jar for this purpose for which the Kantu retaliated and thus starting the headhunting practice. There used to be a tradition of retaliation for old headhunts, which kept the practice alive. External interference by the reign of the Brooke Rajahs in Sarawak via "bebanchak babi" (peacemaking) in Kapit and the Dutch in Kalimantan Borneo via peacemaking at Tumbang Anoi curtailed and limited this tradition.
Apart from massed raids, the practice of headhunting was then limited to individual retaliation attacks or the result of chance encounters. Early Brooke Government reports describe Dayak Iban and Kenyah War parties with captured enemy heads. At various times, there have been massive coordinated raids in the interior and throughout coastal Borneo before and after the arrival of the Raj during Brooke's reign in Sarawak.
The Ibans' journey along the coastal regions using a large boat called "bandong" with sail made of leaves or cloths may have given rise to the term, Sea Dayak, although, throughout the 19th Century, Sarawak Government raids and independent expeditions appeared to have been carried out as far as Brunei, Mindanao, East coast Malaya, Jawa and Celebes.
Tandem diplomatic relations between the Sarawak Government (Brooke Rajah) and Britain (East India Company and
the Royal Navy) acted as a pivot and a deterrence to the former's territorial ambitions, against the Dutch administration in the Kalimantan regions and client sultanates.
In the Indonesian region, toplessness was the norm among the Dayak people, Javanese, and the Balinese people of Indonesia before the introduction of Islam and contact with Western cultures. In Javanese and Balinese societies, women worked or rested comfortably topless. Among the Dayak, only big breasted women or married women with sagging breasts cover their breasts because they interfered with their work. Once marik empang (top cover over the shoulders) and later shirts are available, toplessness has been abandoned.
Metal-working is elaborately developed in making mandaus (machetes - parang in Malay and Indonesian). The blade is made of a softer iron, to prevent breakage, with a narrow strip of a harder iron wedged into a slot in the cutting edge for sharpness in a process called ngamboh (iron-smithing).
In headhunting it was necessary to able to draw the parang quickly. For this purpose, the mandau is fairly short, which also better serves the purpose of trailcutting in dense forest. It is holstered with the cutting edge facing upwards and at that side there is an upward protrusion on the handle, so it can be drawn very quickly with the side of the hand without having to reach over and grasp the handle first. The hand can then grasp the handle while it is being drawn. The combination of these three factors (short, cutting edge up and protrusion) makes for an extremely fast drawing-action.
The ceremonial mandaus used for dances are as beautifully adorned with feathers, as are the costumes. There are various terms to describe different types of Dayak blades. The Nyabor is the traditional Iban Scimitar, Parang Ilang is common to Kayan and Kenyah Swordsmiths, pedang is a sword with a metallic handle and Duku is a multipurpose farm tool and machete of sorts.
Normally, the sword is accompanied by a wooden shield called terabai which is decorated with a demon face to scare off the enemy. Another weapons are sangkoh (spear) and sumpit (blowpipe) with lethal poison at the tip of its laja. To protect the upper body during combat, a gagong (armour) which is made of animal hard skin such as leopards is worn over the shoulders via a hole made for the head to enter.
Dayaks normally build their longhouses on high posts on high ground where possible for protection. They also may build kuta (fencing) and kubau (fort) where necessary to defend against enemy attacks. Dayaks also possess some brass and cast iron weaponry such as brass cannon (bedil) and iron cast cannon meriam. Furthermore, Dayaks are experienced in setting up animal traps (peti) which can be used for attacking enemy as well. The agility and stamina of Dayaks in jungles give them advantages. However, at the end, Dayaks were defeated by handguns and disunity among themselves against the colonialists.
Most importantly, Dayaks will seek divine helps to grant them protection in the in the forms of good dreams or curses by spirits, charms such as pengaroh (normally ponsonous), empelias (weapon straying away) and engkerabun (hidden from normal human eyes), animal omens, bird omens, good divination in the pig liver or by purposely seeking supernatural powers via nampok or betapa or menuntut ilmu (learning knowledge) especially kebal (weapon-proof). During headhunting days, those going to farms will be protected by warriors themselves and big agriculture is also carried out via labour exchange called bedurok (which means a large number of people working together) until completion of the agricultural activity. Kalingai or pantang (tattoo) is made unto bodies to protect from dangers and other signifying purposes such as traveling to certain places.
The traditional Iban Dayak male attire consists of a sirat (loincloth) attached with a small mat for sitting), lelanjang (headgear with colourful bird feathers) or a turban (a long piece of cloth wrapped around the head), marik (chain) around the neck, engkerimok (ring on thigh) and simpai (ring on the upper arms). The Iban Dayak female traditional attire comprises a short "kain tenun betating" (a woven cloth attached with coins and bells at the bottom end), a rattan or brass ring corset, selampai (long scarf) or marik empang (beaded top cover), sugu tinggi (high comb made of silver), simpai (bracelets on upper arms), tumpa (bracelets on lower arms) and buah pauh (fruits on hand).
The Dayaks especially Ibans appreciate and treasure very much the value of pua kumbu (woven or tied cloth) made by women while ceramic jars which they call tajau obtained by men. Pua kumbu has various motives for which some are considered sacred.Tajau has various types with respective monetary values. The jar is a sign of good fortune and wealth. It can also be used to pay fines if some adat is broken in lieu of money which is hard to have in the old days. Beside the jar being used to contain rice or water, it is also used in ritual ceremonies or festivals and given as baya (provision) to the dead.
The adat tebalu (widow or widower fee) for deceased women for Iban Dayaks will be paid according to her social standing and weaving skills and for the men according to his achievements in lifetime.
Dayaks being accustomed to living in jungles and hard terrains, and knowing the plants and animals are extremely good at following animals trails while hunting and of course tracking humans or enemies, thus some Dayaks became very good trackers in jungles in the military e.g. some Iban Dayaks were engaged as trackers during the anti-confrontation by Indonesia against the formation of Federation of Malaysia and anti-communism in Malaysia itself. No doubt, these survival skills are obtained while doing activities in the jungles, which are then utilized for headhunting in the old days.