Fulani nomads keep various species of cattle, but the zebu is the most common in the West African hinterland, due to its drought resistant traits. In the wetter areas of Fouta Djallon and Casamance, the dwarf N'Dama is more common, as they are highly resistant to trypanosomiasis and other conditions directly associated with high humidity. Subspecies of zebu include the White Fulani cattle, locally known as the Aku, Akuji, Bororoji, White Kano, Yakanaji or Bunaji, which are an important beef breed of cattle found throughout the area conquered by the Fulani people and beyond in the Sahel zone of Africa.