Niger-Niandan-Milo is a very large flat expanse of permanent and seasonal rivers and freshwater ponds and marshes, which makes up a critical section of the Niger Basin. Part of the Site lies within the Upper Niger National Park. It is extremely important for its hydrological functions and for its fish biodiversity, with more than 200 species noted. The Site is also host to a large number of waterbirds such as the spur-winged goose (Plectropterus gambensis), the white-faced whistling duck (Dendrocygna viduata), the cattle egret (Bubulcus ibis), the little egret (Egretta garzetta) and the African jacana (Actophilornis africanus). The Site has important cultural value: the forest of Mafou and the pond of Baro are particularly rich in folklore. The construction of a hydroelectric barrage is being planned, but this is not expected to adversely affect the ecology of the Site. Extensive farming with excessive deforestation and burning have led to soil denudation, acceleration of erosion, the destruction of vegetation and scarcity of wildlife resources. Irresponsible fishing practices, such as the use of dynamite and chemicals to cause massive fish mortality, are being countered and steadily reduced.