The folks at ArtInfo.com did a little sleuthing and seem to have confirmed the ubiquitous Banksy’s work in Mali that was first hinted at in his Bristol Museum show earlier this year:
Banksy murals have turned up in some unlikely places, but the latest, Mali, is further-flung than usual. […] Images include two figures hunting a large animal, possibly a bison, with bow and arrow; a woman hanging laundry on a line while a zebra stands by; a child staring out at the viewer from inside a a small metal washing tub; and a young girl with a yellow bird. […] A member of the Banksy Flickr Group says no, he has seen at least one of them in person in the suburbs of Bamako. “There are a handful in Mali, stretching from Bamako to Timbuktu,” writes Flickr user Olly C, adding that they were created four or five months ago and that their locations remain unpublicized.
Banksy Murals Spotted in Mali (ArtInfo.com)