any of several species of small attractive arboreal primates native to sub-Saharan Africa. They are gray, brown, or reddish to yellowish brown, with large eyes and ears, long hind legs, soft, woolly fur, and long tails. Bush babies are also characterized by the long upper portion of the feet (tarsus) and by the ability to fold their ears. They are nocturnal, and they feed on fruits, insects, and even small birds, but a major component of the diet of most species is gum (tree exudate). This they extract by gouging holes in trees and scraping the bark, using their toothcombs (forward-tilted lower incisor and canine teeth). Galagos cling to and leap among the trees; the smaller forms, such as the lesser bush baby (Galago senegalensis), are extremely active and agile. When they descend to the ground, they sit upright, and they move around by jumping with their hind legs like jerboas. Gestation is about three to four months; young usually number one or two.