A specified list of all the flora and fauna found within the savanna region of west africa

It would likely be a very long list. You are talking about every plant and animal in the region. Suggest you do a search (Internet and books) on the individual countries in the region and see what that gets you, but you are not likely to find ALL flora and fauna listed for any given area - only the bigger more noticeable stuff. Getting it all would require a study of a lot of scientific literature.