Eigenes Werk mittels:

• The present distribution in Africa is based upon a map created by 'The African Lion Environmental Research Trust (ALERT) which can be viewed here. http://www.wildlifeextra.com/go/news/lion-reintroduction.html#cr. While I consider this a reliable source, I researched two countries in depth to verify this, Uganda and Namibia. The map is indeed correctly shaded in the National Parks where lions are present. However I did not include the 'Occasional' shaded areas as these are obviously much more ambiguous.
• For the historic distribution, which will never be completely accurate, I used information here on Wikipedia with its own sources.