premise: The North African ostrich or red-necked ostrich ("Struthio camelus camelus"), also known as the Barbary ostrich, is the nominate subspecies of the common ostrich from West and North Africa. It is the largest subspecies, making it the largest living bird.
hypothesis: The North African ostrich can also be found in West Africa
reason: It is stated that the The North African ostrich can be found from West and North Africa, I'm not sure why the system got this wrong.