African Giant Squirrels (genus Protoxerus) form a taxon of squirrels under the subfamily Xerinae. They are only found in Africa. The Forest Giant Squirrel (Protoxerus stangeri) or Stanger's squirrel is a species of rodent in the family Sciuridae found in Angola, Benin, Burundi, Cameroon, the Central African Republic, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Kenya, Liberia, Nigeria, Rwanda, Sierra Leone, Tanzania, Togo, and Uganda. Its natural habitats are subtropical or tropical moist lowland forests and plantations.

The forest giant squirrel is the largest arboreal squirrel in Africa with a head-and-body length of around 300 mm (12 in) and a bushy tail of a similar length. The head is large and rounded with powerful cheek muscles. The brownish hairs on the top of the head and on the nape are tipped with white giving a frosted appearance. The ears are small, rounded and almost hairless. The body colouring is rather variable across the animal's wide range. The fur is short and stiff; the upper parts are medium brown grizzled with buff or yellow, the individual hairs having black bases, yellow or buff shafts and black tips. The chest is white and the underparts are almost hairless showing the yellowish skin. The limbs are compact and strong. The tail is long and bushy and the black and white barring is sometimes not clearly visible. When the animal is moving around, the tail is held horizontally, but when it is stationary, the tail hangs down.