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The second point of transfer was near the Caprivi Strip and the Okavango River where, apparently, the Yeyi language borrowed the clicks from a West Kalihari Khoe language; a separate development lead to a smaller click inventory in the neighboring Mbukushu, Kwangali, Gciriku, Kuhane, and Fwe languages in Angola, Namibia, Botswana, and Zambia.
His field trips ranged over most of Namibia, visiting remote regions such as the Okavango River, Brandberg, Lüderitz, Erongo Mountains and Kaokoveld.
It is seasonally filled by the Taughe River an effluent of the Okavango River system flowing out of the western side of the Okavango Delta.
South of the divide some rivers flow into the Zambezi River system and thence to the Indian Ocean, others to the Okavango River (as the Cubango River is called along the border with Namibia and in Botswana) and thence to Lake Ngami and the Okavango Swamp in Botswana.
It is located along the Okavango river, close to the Okavango Delta panhandle, and has a local airstrip and tarred road.