Complex sentence: The former is predominantly found in the Horn of Africa and the Middle East, while the latter is most frequently observed in North Western Africa; it is also found at lower frequencies in Europe, and in isolated parts of Southeast Africa.
Split into simpler sentences: The former is predominantly found in the Horn of Africa and the Middle East, whereas the latter is most frequently observed in Northwestern Africa. It is also found at lower frequencies in Europe, and in isolated parts of Southeast Africa.