Songhor site is a Miocene site dating back to about 19 million years. Songhor situated in Nyando district, Nyanza province, was gazetted in 1981.
Over the years several mammalian fossils have been discovered at this site ranging from small to bigger apes. There is evidence that the Proconsul africanus, renamed Proconsul heseloni in 1993 by Allan Walker, lived here. The site is important to scholars in the area of palaeontology in that further research at the site can add knowledge of the palaeoenvironment of the region.