Wikipedia
The Biharis is a demonym given to an Indo-Aryan ethno-linguistic group who live in the Indian state of Bihar and Jharkhand. Bihar is home to many different ethnic groups and castes. Biharis speak languages such as Magahi, Bajjika, Maithili, Angika, Bhojpuri, and other local dialects as well as Hindi-Urdu and Nepali. Besides, the state of Bihar, Biharis can be found throughout Purvanchal, North India, West Bengal, Assam, Maharashtra and in the neighbouring countries of Nepal, Pakistan and Bangladesh. A large number of Biharis travelled to various parts of the world in the 19th century to serve as indentured labour on sugarcane and rubber plantations in Guyana, Suriname, Jamaica, Trinidad and Tobago, Fiji, Mauritius and Natal, South Africa. During the partition of India in 1947, many Muslim Biharis migrated to East Bengal (later East Pakistan and subsequently Bangladesh). Bihari people are also well represented in Pakistan's (formerly West Pakistan) Muhajir people as a result of the partition of India, as well as the recent repatriation of some Bihari refugees from Bangladesh to Pakistan.