Bidayuh is the collective name for several indigenous groups found in southern Sarawak and northern West Kalimantan, on the island of Borneo, that are broadly similar in language and culture (see also issues below). The name "Bidayuh" means 'inhabitants of land'. Originally from the western part of Borneo, the collective name Land Dayak was first used during the period of Rajah James Brooke, the White Rajah of Sarawak. They constitute one of the main indigenous groups in Sarawak & West Kalimantan and live in towns and villages around Kuching and Samarahan in the Malaysian state of Sarawak, while in West Kalimantan they are mainly concentrated in the northern Sanggau Regency. In Sarawak, most of Bidayuh population are found within 40 km of the geographical area known as Greater Kuching, within the Kuching and Samarahan division. They are the second largest Dayak ethnic group in Sarawak after the Iban and one of the major Dayak tribes in West Kalimantan.
Predominantly Bidayuh areas in Sawarak are: Lundu, Bau, Penrissen, Padawan, Siburan and Serian. Most of the Bidayuh villages can be found in the rural areas of Lundu, Bau, Padawan, Penrissen, and Serian district. The area continued to the adjecting West Kalimantan border where they resides in Kembayan, Noyan, Sekayam and Jangkang district in Sanggau Regency. The area in which they live is mainly in the basin of the Sarawak River and hilly to mountainous forest, traditionally worked by rotational agriculture and hunting based around farms populated from parent villages situated on the hills for protection. Today, almost all the traditional longhouse-villages have been replaced by individual houses, by roads and there is some plantation agriculture and a reduced emphasis on the growing of hill-padi. Fruit trees, especially Durian, remain important property markers. The distinctive architectural and cultural feature of the Bidayuh is the head-house, now adopted as a symbol.
In Sarawak there are generally said to be three main linguistic groupings (Biatah; Singai-Jagoi; Bukar-Sadong) but these can be broken down even beyond the list referenced below as most people can be distinguished by locals down to village level through smaller differences in vocabulary and intonation. Each area speak its own dialect:
Lundu speak Jagoi, Salako & Lara
Bratak, Singai, Krokong and Jagoi speak Singai-Jagoi
Penrissen speak Bisitang also people in Kampung Bunuk speak "Bunuk" (Segu-Benuk)
Siburan vicinity speak Biatah
Bidayuhs who live around Serian such as Tebakang, Mongkos, Tebedu to Tanjung Amo near the border of Kalimantan Indonesia speak Bukar-Sadong.
Bidayuhs in Padawan speak several but related dialects like Bi-anah, Pinyawa, Braang, Bia', Bisepug & Emperoh/Bipuruh.
The dialects are not mutually intelligible and English or Malay are often used as common languages.