The number of distinct ethnic and linguistic groups in Cameroon is estimated to be between 230 and 282. The Adamawa Plateau broadly bisects these into northern and southern divisions. The northern peoples are Sudanese groups, who live in the central highlands and the northern lowlands, and the Fulani, who are spread throughout northern Cameroon. A small number of Shuwa Arabs live near Lake Chad. Southern Cameroon is inhabited by speakers of Bantu and Semi-Bantu languages. Bantu-speaking groups inhabit the coastal and equatorial zones, while speakers of Semi-Bantu languages live in the Western grassfields. Some 5,000 Gyele and Baka Pygmy peoples roam the southeastern and coastal rainforests or live in small, roadside settlements. Nigerians make up the largest group of foreign nationals.