Complex sentence: They created numerous large reserves for hunting safaris, and later nature reserves and national parks such as the Serengeti, Masai Mara, Kruger and Okavango.
Split into simpler sentences: They created numerous large reserves for hunting safaris. Later, much of the land was turned over to nature reserves and national parks such as the Serengeti, Masai Mara, Kruger and Okavango.